{"id":5411,"date":"2026-06-06T18:31:22","date_gmt":"2026-06-06T11:31:22","guid":{"rendered":"https:\/\/wpdesign.vn\/?p=5411"},"modified":"2026-06-07T15:03:26","modified_gmt":"2026-06-07T08:03:26","slug":"core-web-vitals-mobile-toi-uu-website-viet-nam","status":"publish","type":"post","link":"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/","title":{"rendered":"H\u01b0\u1edbng D\u1eabn To\u00e0n Di\u1ec7n T\u1ed1i \u01afu Core Web Vitals Mobile \u2014 6 B\u01b0\u1edbc Ki\u1ec3m Tra B\u1eaft Bu\u1ed9c Cho Website Vi\u1ec7t Nam"},"content":{"rendered":"<p>\u0110i\u1ec3m <strong>Core Web Vitals mobile<\/strong> hi\u1ec7n l\u00e0 t\u00edn hi\u1ec7u x\u1ebfp h\u1ea1ng ch\u00ednh th\u1ee9c, \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn th\u1ee9 h\u1ea1ng t\u00ecm ki\u1ebfm tr\u00ean Google.com.vn. V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ch\u1ed7 m\u00f4i tr\u01b0\u1eddng di \u0111\u1ed9ng t\u1ea1i Vi\u1ec7t Nam kh\u1eaft khe h\u01a1n nhi\u1ec1u so v\u1edbi H\u00e0n Qu\u1ed1c \u2014 v\u00e0 \u0111\u00e2y l\u00e0 \u0111i\u1ec1u kh\u00f4ng \u00edt doanh nghi\u1ec7p b\u1ecf qua khi m\u1edbi b\u01b0\u1edbc v\u00e0o th\u1ecb tr\u01b0\u1eddng n\u00e0y.<\/p>\n<p>Ngay t\u1ea1i trung t\u00e2m TP.HCM, v\u1eabn c\u00f3 nh\u1eefng khu v\u1ef1c s\u00f3ng 4G ch\u1eadp ch\u1eddn, kh\u00f4ng \u1ed5n \u0111\u1ecbnh. Trong khi \u0111\u00f3, h\u01a1n 90% ng\u01b0\u1eddi ti\u00eau d\u00f9ng Vi\u1ec7t Nam th\u1ef1c hi\u1ec7n l\u1ea7n t\u00ecm ki\u1ebfm \u0111\u1ea7u ti\u00ean b\u1eb1ng \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fd do v\u00ec sao nhi\u1ec1u website v\u1eadn h\u00e0nh t\u1ed1t \u1edf H\u00e0n Qu\u1ed1c l\u1ea1i ch\u1ec9 \u0111\u1ea1t 40 \u0111i\u1ec3m tr\u00ean PageSpeed Insights khi ki\u1ec3m tra trong m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam. B\u00e0i vi\u1ebft n\u00e0y t\u1ed5ng h\u1ee3p quy tr\u00ecnh th\u1ef1c chi\u1ebfn 6 b\u01b0\u1edbc \u0111\u1ec3 t\u1ed1i \u01b0u ba ch\u1ec9 s\u1ed1 <strong>Core Web Vitals mobile<\/strong> \u2014 LCP, CLS v\u00e0 INP \u2014 ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c th\u00f9 m\u00f4i tr\u01b0\u1eddng k\u1ef9 thu\u1eadt s\u1ed1 t\u1ea1i Vi\u1ec7t Nam.<\/p>\n<hr>\n<blockquote>\n<p><strong>T\u00f3m t\u1eaft b\u00e0i vi\u1ebft trong 3 \u0111i\u1ec3m<\/strong><br \/>\n1. \u0110i\u1ec3m Core Web Vitals mobile \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn th\u1ee9 h\u1ea1ng Google.com.vn. V\u1edbi m\u00f4i tr\u01b0\u1eddng m\u1ea1ng 3G\/4G t\u1ea1i Vi\u1ec7t Nam, \u0111i\u1ec3m s\u1ed1 b\u1ecb tr\u1eeb nhanh h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi H\u00e0n Qu\u1ed1c.<br \/>\n2. M\u1ee5c ti\u00eau c\u1ea7n \u0111\u1ea1t: LCP d\u01b0\u1edbi 2,5 gi\u00e2y, CLS d\u01b0\u1edbi 0,1 v\u00e0 INP d\u01b0\u1edbi 200ms \u2014 c\u1ea7n t\u1ed1i \u01b0u tu\u1ea7n t\u1ef1 t\u1eeb h\u00ecnh \u1ea3nh, ph\u00f4ng ch\u1eef \u0111\u1ebfn b\u1ed1 c\u1ee5c trang.<br \/>\n3. \u00c1p d\u1ee5ng \u0111\u00fang quy tr\u00ecnh c\u1ea3i thi\u1ec7n t\u1eeb c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf c\u1ee7a WPdesign.vn, b\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111i\u1ec3m PageSpeed Insights mobile tr\u00ean 70 \u0111i\u1ec3m m\u1ed9t c\u00e1ch \u1ed5n \u0111\u1ecbnh.<\/p>\n<\/blockquote>\n<hr>\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#1_Core_Web_Vitals_Mobile_%E2%80%94_Tom_Tat_3_Chi_So_Quan_Trong\" >1. Core Web Vitals Mobile \u2014 T\u00f3m T\u1eaft 3 Ch\u1ec9 S\u1ed1 Quan Tr\u1ecdng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#2_Vi_Sao_Moi_Truong_Viet_Nam_Lam_Giam_Diem_So\" >2. V\u00ec Sao M\u00f4i Tr\u01b0\u1eddng Vi\u1ec7t Nam L\u00e0m Gi\u1ea3m \u0110i\u1ec3m S\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#3_Buoc_1_2_%E2%80%94_Keo_LCP_Xuong_Duoi_25_Giay\" >3. B\u01b0\u1edbc 1 &amp; 2 \u2014 K\u00e9o LCP Xu\u1ed1ng D\u01b0\u1edbi 2,5 Gi\u00e2y<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#Buoc_1_%E2%80%94_Chuyen_hinh_anh_hero_sang_WebP_va_them_thuoc_tinh_fetchpriority%22high%22\" >B\u01b0\u1edbc 1 \u2014 Chuy\u1ec3n h\u00ecnh \u1ea3nh hero sang WebP v\u00e0 th\u00eam thu\u1ed9c t\u00ednh fetchpriority=\"high\"<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#Buoc_2_%E2%80%94_Loai_bo_tai_nguyen_chan_render_render-blocking_resources\" >B\u01b0\u1edbc 2 \u2014 Lo\u1ea1i b\u1ecf t\u00e0i nguy\u00ean ch\u1eb7n render (render-blocking resources)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#4_Buoc_3_4_%E2%80%94_On_Dinh_Bo_Cuc_Voi_CLS_Duoi_01\" >4. B\u01b0\u1edbc 3 &amp; 4 \u2014 \u1ed4n \u0110\u1ecbnh B\u1ed1 C\u1ee5c V\u1edbi CLS D\u01b0\u1edbi 0,1<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#Buoc_3_%E2%80%94_Khai_bao_ro_width%C2%B7height_hoac_aspect-ratio_cho_hinh_anh_va_noi_dung_nhung\" >B\u01b0\u1edbc 3 \u2014 Khai b\u00e1o r\u00f5 width\u00b7height ho\u1eb7c aspect-ratio cho h\u00ecnh \u1ea3nh v\u00e0 n\u1ed9i dung nh\u00fang<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/#%ED%95%A8%EA%BB%98_%EC%9D%BD%EA%B8%B0\" >\ud568\uaed8 \uc77d\uae30<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"1-core-web-vitals-mobile-tom-tat-3-chi-so-quan-trong\"><span class=\"ez-toc-section\" id=\"1_Core_Web_Vitals_Mobile_%E2%80%94_Tom_Tat_3_Chi_So_Quan_Trong\"><\/span>1. Core Web Vitals Mobile \u2014 T\u00f3m T\u1eaft 3 Ch\u1ec9 S\u1ed1 Quan Tr\u1ecdng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"wp-block-image size-large\">\n  <img decoding=\"async\" src=\"https:\/\/wpdesign.vn\/wp-content\/uploads\/2026\/06\/02_s1-8.jpg\" alt=\"Core Web Vitals mobile core web vitals metrics chart\" \/><br \/>\n<\/figure>\n<p>Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u t\u1ed1i \u01b0u <strong>Core Web Vitals mobile<\/strong>, b\u1ea1n c\u1ea7n hi\u1ec3u r\u00f5 t\u1eebng ch\u1ec9 s\u1ed1 \u0111ang \u0111o l\u01b0\u1eddng \u0111i\u1ec1u g\u00ec. Nhi\u1ec1u ch\u1ee7 doanh nghi\u1ec7p bi\u1ebft t\u00ean ba ch\u1ec9 s\u1ed1 n\u00e0y nh\u01b0ng l\u1ea1i kh\u00f4ng n\u1eafm \u0111\u01b0\u1ee3c \u00fd ngh\u0129a th\u1ef1c t\u1ebf \u2014 v\u00e0 \u0111\u00f3 l\u00e0 nguy\u00ean nh\u00e2n d\u1eabn \u0111\u1ebfn vi\u1ec7c s\u1eeda sai ch\u1ed7, m\u1ea5t th\u1eddi gian m\u00e0 \u0111i\u1ec3m s\u1ed1 v\u1eabn kh\u00f4ng c\u1ea3i thi\u1ec7n.<\/p>\n<table>\n<thead>\n<tr>\n<th>Ch\u1ec9 s\u1ed1<\/th>\n<th>T\u00ean \u0111\u1ea7y \u0111\u1ee7<\/th>\n<th>M\u1ee5c ti\u00eau<\/th>\n<th>N\u1ed9i dung \u0111o l\u01b0\u1eddng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>LCP<\/td>\n<td>Largest Contentful Paint<\/td>\n<td><strong>D\u01b0\u1edbi 2,5 gi\u00e2y<\/strong><\/td>\n<td>Th\u1eddi gian t\u1ea3i ph\u1ea7n t\u1eed l\u1edbn nh\u1ea5t tr\u00ean m\u00e0n h\u00ecnh (h\u00ecnh \u1ea3nh ho\u1eb7c kh\u1ed1i v\u0103n b\u1ea3n)<\/td>\n<\/tr>\n<tr>\n<td>CLS<\/td>\n<td>Cumulative Layout Shift<\/td>\n<td><strong>D\u01b0\u1edbi 0,1<\/strong><\/td>\n<td>M\u1ee9c \u0111\u1ed9 d\u1ecbch chuy\u1ec3n b\u1ed1 c\u1ee5c trang trong qu\u00e1 tr\u00ecnh t\u1ea3i<\/td>\n<\/tr>\n<tr>\n<td>INP<\/td>\n<td>Interaction to Next Paint<\/td>\n<td><strong>D\u01b0\u1edbi 200ms<\/strong><\/td>\n<td>T\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i c\u1ee7a m\u00e0n h\u00ecnh sau khi ng\u01b0\u1eddi d\u00f9ng nh\u1ea5n n\u00fat ho\u1eb7c menu<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>T\u1eeb th\u00e1ng 3 n\u0103m 2024, Google \u0111\u00e3 ch\u00ednh th\u1ee9c thay th\u1ebf FID (First Input Delay) b\u1eb1ng INP. N\u1ebfu b\u1ea1n v\u1eabn \u0111ang t\u1ed1i \u01b0u theo ti\u00eau ch\u00ed FID c\u0169, h\u00e3y m\u1edf ngay b\u00e1o c\u00e1o <strong>Core Web Vitals<\/strong> trong Google Search Console v\u00e0 ki\u1ec3m tra m\u1ee5c INP. \u0110\u1ed1i v\u1edbi c\u00e1c website ho\u1ea1t \u0111\u1ed9ng t\u1ea1i th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam, l\u1ed7i INP xu\u1ea5t hi\u1ec7n v\u1edbi t\u1ea7n su\u1ea5t cao nh\u1ea5t trong s\u1ed1 ba ch\u1ec9 s\u1ed1 n\u00e0y \u2014 \u0111\u1eb7c bi\u1ec7t tr\u00ean c\u00e1c trang c\u00f3 nhi\u1ec1u th\u00e0nh ph\u1ea7n t\u01b0\u01a1ng t\u00e1c nh\u01b0 gi\u1ecf h\u00e0ng, b\u1ed9 l\u1ecdc s\u1ea3n ph\u1ea9m hay form \u0111\u0103ng k\u00fd.<\/p>\n<p>T\u00e0i li\u1ec7u tham kh\u1ea3o ch\u00ednh th\u1ee9c: <a href=\"https:\/\/developers.google.com\/search\/docs\/appearance\/core-web-vitals\" target=\"_blank\" rel=\"noopener\">Google Search Central \u2014 Core Web Vitals<\/a><\/p>\n<hr>\n<h2 id=\"2-vi-sao-moi-truong-viet-nam-lam-giam-iem-so\"><span class=\"ez-toc-section\" id=\"2_Vi_Sao_Moi_Truong_Viet_Nam_Lam_Giam_Diem_So\"><\/span>2. V\u00ec Sao M\u00f4i Tr\u01b0\u1eddng Vi\u1ec7t Nam L\u00e0m Gi\u1ea3m \u0110i\u1ec3m S\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"wp-block-image size-large\">\n  <img decoding=\"async\" src=\"https:\/\/wpdesign.vn\/wp-content\/uploads\/2026\/06\/03_s2-8.jpg\" alt=\"vietnam mobile user street cafe\" \/><br \/>\n<\/figure>\n<p>PageSpeed Insights t\u00ednh \u0111i\u1ec3m d\u1ef1a tr\u00ean d\u1eef li\u1ec7u th\u1ef1c t\u1ebf c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u2014 c\u00f2n g\u1ecdi l\u00e0 d\u1eef li\u1ec7u CrUX (Chrome User Experience Report). \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 v\u1edbi nh\u1eefng website \u0111\u00e3 t\u00edch l\u0169y \u0111\u1ee7 l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng Vi\u1ec7t Nam, <strong>\u0111i\u1ec1u ki\u1ec7n m\u1ea1ng th\u1ef1c t\u1ebf t\u1ea1i Vi\u1ec7t Nam<\/strong> s\u1ebd \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh tr\u1ef1c ti\u1ebfp v\u00e0o \u0111i\u1ec3m s\u1ed1. Kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o &#8220;qua m\u1eb7t&#8221; con s\u1ed1 n\u00e0y b\u1eb1ng c\u00e1ch \u0111o tr\u00ean m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n t\u1ea1i H\u00e0n Qu\u1ed1c.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ba nguy\u00ean nh\u00e2n \u0111\u1eb7c th\u00f9 khi\u1ebfn \u0111i\u1ec3m s\u1ed1 b\u1ecb k\u00e9o xu\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam:<\/p>\n<p><strong>1. V\u1ecb tr\u00ed m\u00e1y ch\u1ee7 kh\u00f4ng ph\u00f9 h\u1ee3p<\/strong><br \/>\nS\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 \u0111\u1eb7t t\u1ea1i H\u00e0n Qu\u1ed1c khi\u1ebfn TTFB (Time to First Byte \u2014 th\u1eddi gian nh\u1eadn byte \u0111\u1ea7u ti\u00ean) c\u1ee7a ng\u01b0\u1eddi d\u00f9ng Vi\u1ec7t Nam t\u0103ng th\u00eam trung b\u00ecnh 800ms. So v\u1edbi m\u00e1y ch\u1ee7 \u0111\u1eb7t t\u1ea1i khu v\u1ef1c g\u1ea7n h\u01a1n nh\u01b0 Singapore (bao g\u1ed3m c\u1ea3 CDN), LCP c\u00f3 th\u1ec3 ch\u00eanh nhau h\u01a1n 1,2 gi\u00e2y \u2014 m\u1ed9t con s\u1ed1 \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea9y website t\u1eeb v\u00f9ng &#8220;t\u1ed1t&#8221; sang v\u00f9ng &#8220;c\u1ea7n c\u1ea3i thi\u1ec7n&#8221; ngay l\u1eadp t\u1ee9c.<\/p>\n<p><strong>2. Upload h\u00ecnh \u1ea3nh g\u1ed1c dung l\u01b0\u1ee3ng l\u1edbn t\u1eeb H\u00e0n Qu\u1ed1c<\/strong><br \/>\nC\u00e1c banner qu\u1ea3ng c\u00e1o \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u1ea1i H\u00e0n Qu\u1ed1c th\u01b0\u1eddng c\u00f3 dung l\u01b0\u1ee3ng t\u1eeb 2MB tr\u1edf l\u00ean. Khi upload th\u1eb3ng l\u00ean server m\u00e0 kh\u00f4ng n\u00e9n ho\u1eb7c chuy\u1ec3n \u0111\u1ed5i \u0111\u1ecbnh d\u1ea1ng, LCP tr\u00ean m\u00f4i tr\u01b0\u1eddng 4G Vi\u1ec7t Nam d\u1ec5 v\u01b0\u1ee3t qu\u00e1 5 gi\u00e2y \u2014 v\u01b0\u1ee3t ng\u01b0\u1ee1ng &#8220;k\u00e9m&#8221; c\u1ee7a Google.<\/p>\n<p><strong>3. G\u1ecdi Google Fonts tr\u1ef1c ti\u1ebfp t\u1eeb CDN c\u1ee7a Google<\/strong><br \/>\nT\u1ea1i m\u1ed9t s\u1ed1 th\u1eddi \u0111i\u1ec3m v\u00e0 khu v\u1ef1c \u0111\u1ecba l\u00fd t\u1ea1i Vi\u1ec7t Nam, t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i t\u1eeb m\u00e1y ch\u1ee7 Google Fonts API kh\u00f4ng \u1ed5n \u0111\u1ecbnh. \u0110i\u1ec1u n\u00e0y g\u00e2y ra t\u00ecnh tr\u1ea1ng font ch\u1eef ch\u1eb7n qu\u00e1 tr\u00ecnh render (render-blocking), l\u00e0m tr\u1ec5 to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh hi\u1ec3n th\u1ecb trang.<\/p>\n<p><strong>Minh ch\u1ee9ng t\u1eeb th\u1ef1c t\u1ebf:<\/strong> Trong d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng website th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed cho th\u01b0\u01a1ng hi\u1ec7u th\u1ef1c ph\u1ea9m H\u00e0n Qu\u1ed1c t\u1ea1i Vi\u1ec7t Nam do WPdesign.vn th\u1ef1c hi\u1ec7n n\u0103m 2024, ch\u1ec9 sau khi chuy\u1ec3n m\u00e1y ch\u1ee7 sang CDN Singapore v\u00e0 chuy\u1ec3n \u0111\u1ed5i to\u00e0n b\u1ed9 h\u00ecnh \u1ea3nh sang \u0111\u1ecbnh d\u1ea1ng WebP, ch\u1ec9 s\u1ed1 LCP \u0111\u00e3 \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn t\u1eeb 6,2 gi\u00e2y xu\u1ed1ng c\u00f2n 2,1 gi\u00e2y \u2014 m\u00e0 ch\u01b0a c\u1ea7n thay \u0111\u1ed5i b\u1ea5t k\u1ef3 d\u00f2ng code n\u00e0o kh\u00e1c.<\/p>\n<hr>\n<h2 id=\"3-buoc-1-2-keo-lcp-xuong-duoi-25-giay\"><span class=\"ez-toc-section\" id=\"3_Buoc_1_2_%E2%80%94_Keo_LCP_Xuong_Duoi_25_Giay\"><\/span>3. B\u01b0\u1edbc 1 &amp; 2 \u2014 K\u00e9o LCP Xu\u1ed1ng D\u01b0\u1edbi 2,5 Gi\u00e2y<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"wp-block-image size-large\">\n  <img decoding=\"async\" src=\"https:\/\/wpdesign.vn\/wp-content\/uploads\/2026\/06\/04_s3-8.jpg\" alt=\"wordpress image optimization webp\" \/><br \/>\n<\/figure>\n<h3 id=\"buoc-1-chuyen-hinh-anh-hero-sang-webp-va-them-thuoc-tinh-fetchpriorityhigh\"><span class=\"ez-toc-section\" id=\"Buoc_1_%E2%80%94_Chuyen_hinh_anh_hero_sang_WebP_va_them_thuoc_tinh_fetchpriority%22high%22\"><\/span>B\u01b0\u1edbc 1 \u2014 Chuy\u1ec3n h\u00ecnh \u1ea3nh hero sang WebP v\u00e0 th\u00eam thu\u1ed9c t\u00ednh <code>fetchpriority=\"high\"<\/code><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong ph\u1ea7n l\u1edbn tr\u01b0\u1eddng h\u1ee3p, ph\u1ea7n t\u1eed LCP ch\u00ednh l\u00e0 h\u00ecnh \u1ea3nh banner l\u1edbn \u1edf \u0111\u1ea7u trang (hero image). \u0110\u00e2y c\u0169ng l\u00e0 n\u01a1i b\u1ea1n s\u1ebd thu \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 c\u1ea3i thi\u1ec7n r\u00f5 r\u1ec7t nh\u1ea5t v\u00e0 nhanh nh\u1ea5t.<\/p>\n<p>\u0110\u1ec3 x\u1eed l\u00fd trong WordPress m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c qu\u00e1 nhi\u1ec1u v\u00e0o plugin:<br \/>\n&#8211; Th\u00eam filter h\u1ed7 tr\u1ee3 WebP v\u00e0o <code>functions.php<\/code>, ho\u1eb7c s\u1eed d\u1ee5ng plugin <strong>Imagify<\/strong> hay <strong>ShortPixel<\/strong> \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed5i \u0111\u1ecbnh d\u1ea1ng to\u00e0n b\u1ed9 th\u01b0 vi\u1ec7n \u1ea3nh.<br \/>\n&#8211; Th\u00eam thu\u1ed9c t\u00ednh <code>fetchpriority=\"high\"<\/code> v\u00e0o th\u1ebb <code>&lt;img&gt;<\/code> c\u1ee7a h\u00ecnh hero. V\u1edbi WordPress 6.3 tr\u1edf l\u00ean, b\u1ea1n c\u00f3 th\u1ec3 truy\u1ec1n tham s\u1ed1 n\u00e0y tr\u1ef1c ti\u1ebfp qua h\u00e0m <code>wp_get_attachment_image()<\/code>.<br \/>\n&#8211; <strong>Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u00e1p d\u1ee5ng lazy loading cho h\u00ecnh \u1ea3nh hero.<\/strong> N\u1ebfu thu\u1ed9c t\u00ednh <code>loading=\"lazy\"<\/code> b\u1ecb g\u1eafn nh\u1ea7m v\u00e0o h\u00ecnh hero, LCP s\u1ebd b\u1ecb c\u1ed9ng th\u00eam 2\u20133 gi\u00e2y ngay l\u1eadp t\u1ee9c \u2014 \u0111\u00e2y l\u00e0 l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t m\u00e0 WPdesign.vn g\u1eb7p khi audit website c\u1ee7a c\u00e1c kh\u00e1ch h\u00e0ng m\u1edbi.<\/p>\n<h3 id=\"buoc-2-loai-bo-tai-nguyen-chan-render-render-blocking-resources\"><span class=\"ez-toc-section\" id=\"Buoc_2_%E2%80%94_Loai_bo_tai_nguyen_chan_render_render-blocking_resources\"><\/span>B\u01b0\u1edbc 2 \u2014 Lo\u1ea1i b\u1ecf t\u00e0i nguy\u00ean ch\u1eb7n render (render-blocking resources)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Thay v\u00ec g\u1ecdi Google Fonts tr\u1ef1c ti\u1ebfp t\u1eeb CDN, h\u00e3y t\u1ef1 host file font tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n (self-hosting), ho\u1eb7c th\u00eam thu\u1ed9c t\u00ednh <code>font-display: swap<\/code> v\u00e0o CSS \u0111\u1ec3 tr\u00ecnh duy\u1ec7t kh\u00f4ng b\u1ecb ch\u1eb7n trong khi ch\u1edd font t\u1ea3i. C\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec1u c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng \u0111\u1ed3ng th\u1eddi \u0111\u1ec3 t\u1ed1i \u0111a hi\u1ec7u qu\u1ea3.<\/p>\n<p>Ngo\u00e0i ra, h\u00e3y d\u00f9ng plugin <strong>Asset CleanUp<\/strong> \u0111\u1ec3 ki\u1ec3m tra xem c\u00e1c file CSS v\u00e0 JavaScript t\u1eeb plugin kh\u00f4ng c\u1ea7n thi\u1ebft c\u00f3 \u0111ang \u0111\u01b0\u1ee3c t\u1ea3i tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c trang hay kh\u00f4ng. M\u1ee9c trung b\u00ecnh c\u1ee7a c\u00e1c website Vi\u1ec7t Nam th\u01b0\u1eddng c\u00f3 6\u201310 t\u00e0i nguy\u00ean ch\u1eb7n render \u2014 n\u1ebfu b\u1ea1n k\u00e9o con s\u1ed1 n\u00e0y xu\u1ed1ng d\u01b0\u1edbi 2, LCP s\u1ebd c\u1ea3i thi\u1ec7n t\u1eeb 0,5 \u0111\u1ebfn 1 gi\u00e2y m\u00e0 kh\u00f4ng c\u1ea7n l\u00e0m g\u00ec th\u00eam.<\/p>\n<hr>\n<h2 id=\"4-buoc-3-4-on-inh-bo-cuc-voi-cls-duoi-01\"><span class=\"ez-toc-section\" id=\"4_Buoc_3_4_%E2%80%94_On_Dinh_Bo_Cuc_Voi_CLS_Duoi_01\"><\/span>4. B\u01b0\u1edbc 3 &amp; 4 \u2014 \u1ed4n \u0110\u1ecbnh B\u1ed1 C\u1ee5c V\u1edbi CLS D\u01b0\u1edbi 0,1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"wp-block-image size-large\">\n  <img decoding=\"async\" src=\"https:\/\/wpdesign.vn\/wp-content\/uploads\/2026\/06\/05_s4-8.jpg\" alt=\"layout shift cls fix code\" \/><br \/>\n<\/figure>\n<h3 id=\"buoc-3-khai-bao-ro-widthheight-hoac-aspect-ratio-cho-hinh-anh-va-noi-dung-nhung\"><span class=\"ez-toc-section\" id=\"Buoc_3_%E2%80%94_Khai_bao_ro_width%C2%B7height_hoac_aspect-ratio_cho_hinh_anh_va_noi_dung_nhung\"><\/span>B\u01b0\u1edbc 3 \u2014 Khai b\u00e1o r\u00f5 width\u00b7height ho\u1eb7c aspect-ratio cho h\u00ecnh \u1ea3nh v\u00e0 n\u1ed9i dung nh\u00fang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nguy\u00ean nh\u00e2n h\u00e0ng \u0111\u1ea7u g\u00e2y ra CLS cao l\u00e0 h\u00ecnh \u1ea3nh kh\u00f4ng \u0111\u01b0\u1ee3c khai b\u00e1o k\u00edch th\u01b0\u1edbc. Khi tr\u00ecnh duy\u1ec7t ch\u01b0a t\u1ea3i xong \u1ea3nh, n\u00f3 kh\u00f4ng bi\u1ebft c\u1ea7n d\u00e0nh bao nhi\u00eau kh\u00f4ng gian \u2014 v\u00e0 khi \u1ea3nh xu\u1ea5t hi\u1ec7n, to\u00e0n b\u1ed9 v\u0103n b\u1ea3n b\u00ean d\u01b0\u1edbi b\u1ecb \u0111\u1ea9y xu\u1ed1ng \u0111\u1ed9t ng\u1ed9t. Ng\u01b0\u1eddi d\u00f9ng \u0111ang \u0111\u1ecdc n\u1ed9i dung s\u1ebd th\u1ea5y trang &#8220;nh\u1ea3y&#8221; \u2014 tr\u1ea3i nghi\u1ec7m n\u00e0y c\u1ef1c k\u1ef3 kh\u00f3 ch\u1ecbu v\u00e0 l\u00e0m t\u0103ng t\u1ef7 l\u1ec7 tho\u00e1t trang.<\/p>\n<p>Gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n v\u00e0 hi\u1ec7u qu\u1ea3 nh\u1ea5t l\u00e0 lu\u00f4n khai b\u00e1o c\u1eb7p thu\u1ed9c t\u00ednh <code>width<\/code> v\u00e0 <code>height<\/code> tr\u1ef1c ti\u1ebfp tr\u00ean th\u1ebb <code>&lt;img&gt;<\/code>, ho\u1eb7c \u0111\u1ecbnh ngh\u0129a <code>aspect-ratio<\/code> trong CSS cho container ch\u1ee9a \u1ea3nh. V\u00ed d\u1ee5:<\/p>\n<h2 id=\"_1\"><span class=\"ez-toc-section\" id=\"%ED%95%A8%EA%BB%98_%EC%9D%BD%EA%B8%B0\"><\/span>\ud568\uaed8 \uc77d\uae30<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><a href=\"https:\/\/wpdesign.vn\/vi\/core-web-vitals-mobile-toi-uu-website-viet-nam\/\">Core Web Vitals \ubaa8\ubc14\uc77c \ucd5c\uc801\ud654 \uc644\ubcbd \uac00\uc774\ub4dc \u2014 \ubca0\ud2b8\ub0a8 \uc0ac\uc774\ud2b8 \ud544\uc218 \uc810\uac80 6\ub2e8\uacc4<\/a><\/li>\n<li><a href=\"https:\/\/wpdesign.vn\/?p=5391\">\ubca0\ud2b8\ub0a8 \uad6c\uae00 \uc0c1\uc704 \ub178\ucd9c \uc644\ubcbd \uac00\uc774\ub4dc \u2014 \ud55c\uad6d \uc0ac\uc5c5\uc790 \ud544\uc218 SEO \uc804\ub7b5 6\ub2e8\uacc4<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u0110i\u1ec3m Core Web Vitals mobile th\u1ea5p s\u1ebd ch\u1eb7n website c\u1ee7a b\u1ea1n l\u00ean top Google.com.vn. H\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf c\u1ea3i thi\u1ec7n LCP\u00b7CLS\u00b7INP cho website Vi\u1ec7t Nam, \u0111\u00fac k\u1ebft t\u1eeb kinh ng<\/p>\n","protected":false},"author":1,"featured_media":5511,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rank_math_focus_keyword":"Core Web Vitals mobile","rank_math_title":"Core Web Vitals Mobile \u2014 6 B\u01b0\u1edbc T\u1ed1i \u01afu Cho Website Vi\u1ec7t Nam","rank_math_description":"\u0110i\u1ec3m Core Web Vitals mobile th\u1ea5p s\u1ebd ch\u1eb7n website c\u1ee7a b\u1ea1n l\u00ean top Google.com.vn. H\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf c\u1ea3i thi\u1ec7n LCP\u00b7CLS\u00b7INP cho website Vi\u1ec7t Nam, \u0111\u00fac k\u1ebft t\u1eeb kinh nghi\u1ec7m th\u1ef1c chi\u1ebfn t\u1ea1i TP.HCM. T\u1ed5ng h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 t\u1eebng b\u01b0\u1edbc k\u00e8m s\u1ed1 li\u1ec7u th\u1ef1c t\u1ebf.","rank_math_canonical_url":"","rank_math_facebook_title":"","rank_math_facebook_description":"","rank_math_twitter_title":"","rank_math_twitter_description":"","_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[27,7],"tags":[204,173,84,205,203,209,206,101,210,211],"class_list":["post-5411","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-cls","tag-core-web-vitals","tag-google-com-vn","tag-inp","tag-lcp","tag-mobile-seo","tag-pagespeed-insights","tag-seo-viet-nam","tag-toi-uu-wordpress","tag-website-tp-hcm"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts\/5411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/comments?post=5411"}],"version-history":[{"count":3,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts\/5411\/revisions"}],"predecessor-version":[{"id":5567,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts\/5411\/revisions\/5567"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/media\/5511"}],"wp:attachment":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/media?parent=5411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/categories?post=5411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/tags?post=5411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}