In this post, I describe how to reduce the impact of third-pary code such as Google Tag Manager (gtag) and Google Analytics. This can lead to a longer Largest Contentful Paint (LCP) which can cause Google Search Console Core Web Vitals to report "LCP issue: longer than 2.5s" and URLs as either "poor" or "need improvement". Cause The "reduce the impact of third-pary code" message can appear when you run PageSpeed Insights or Lighthouse within Google Chrome on a page which includes the Google Tag (gtag.js).  I found that my performance score would still be negatively impacted even if I used async or defer in the script tag which loaded the Google Tag. I tested removing the Google Tag completely and my score improved to 100 so I knew the Google Tag was the cause. Resolution To resolve the issue, I set a timeout then loaded the Google Tag Manager after the timeout, in this case 3,000 milliseconds later: window.setTimeout(function () { ( function (w,...

This post describes how to fix the error Missing field 'id' (in 'itemListElement.item') which can occur in Google Search Console. Cause This error can occur when the optional field 'id' is missing from item in breadcrumb structured data. You can use Google's  Rich Results Test  to verify this issue: Resolution To resolve this error, add the itemid attribute to the item in the breadcrumb structured data, as highlighted below. < ol   class ="css-breadcrumb-trail"   itemscope   itemtype ="http://schema.org/BreadcrumbList">      < li   id ="breadcrumbTrail_listitem1"   itemprop ="itemListElement"   itemscope =""   itemtype ="http://schema.org/ListItem">          < span >              < a   id ="breadcrumbTrail_crumb1a"   itemscope =""   itemtype ="http://schema.org/WebPage"   itempro...