Ad networks on WordPress sites and the Core Web Vitals

Sites with Prebid.js ad networks pass all three Core Web Vitals most often: 54%, against 63% of all WordPress sites. The biggest gap is LCP, 74% against 70%.

Sites with Prebid.js ad networks have a good LCP most often: 74%, against 70% of all WordPress sites. Sites with Google AdSense ad networks have it least often, at 64%.

Sites with Google AdSense ad networks have a good INP most often: 93%, against 98% of all WordPress sites. Sites with Google Publisher Tag ad networks have it least often, at 92%.

Sites with Google AdSense ad networks have a good CLS most often: 81%, against 89% of all WordPress sites. Sites with Google Publisher Tag ad networks have it least often, at 72%.

Google AdSense is the most used: 94.0% of WordPress sites. Prebid.js is 5.3% of WordPress sites.

Across the four LCP sub-parts in Chrome's field data, the largest gap between Prebid.js and Google AdSense sits in time to first byte (TTFB): 641 ms median for Prebid.js against 1190 ms for Google AdSense. Overall median field LCP is 1.8s for Prebid.js (TTFB 641 ms, load delay 401 ms, load duration 197 ms, render delay 266 ms) versus 2.1s for Google AdSense.

Across the four LCP sub-parts in Chrome's field data, the largest gap between Prebid.js and Google AdSense sits in time to first byte (TTFB): 641 ms median for Prebid.js against 1190 ms for Google AdSense. Overall median field LCP is 1.8s for Prebid.js (TTFB 641 ms, load delay 401 ms, load duration 197 ms, render delay 266 ms) versus 2.1s for Google AdSense.

Across the four LCP sub-parts in Chrome's field data, the largest gap between Prebid.js and Google AdSense sits in time to first byte (TTFB): 641 ms median for Prebid.js against 1190 ms for Google AdSense. Overall median field LCP is 1.8s for Prebid.js (TTFB 641 ms, load delay 401 ms, load duration 197 ms, render delay 266 ms) versus 2.1s for Google AdSense.

Across the four LCP sub-parts in Chrome's field data, the largest gap between Prebid.js and Google AdSense sits in time to first byte (TTFB): 641 ms median for Prebid.js against 1190 ms for Google AdSense. Overall median field LCP is 1.8s for Prebid.js (TTFB 641 ms, load delay 401 ms, load duration 197 ms, render delay 266 ms) versus 2.1s for Google AdSense.

On jQuery, 94% of sites use Google AdSense ad networks, and 62% of jQuery sites pass all three Core Web Vitals, against 63% of all sites. On Vue, 96% of sites use Google AdSense, and 61% of Vue sites pass all three.

On jQuery, 94% of sites use Google AdSense ad networks, and 69% of jQuery sites have a good LCP, against 70% of all sites. On Vue, 96% of sites use Google AdSense, and 68% of Vue sites have a good LCP.

On jQuery, 94% of sites use Google AdSense ad networks, and 98% of jQuery sites have a good INP, against 98% of all sites. On Vue, 96% of sites use Google AdSense, and 97% of Vue sites have a good INP.

On jQuery, 94% of sites use Google AdSense ad networks, and 89% of jQuery sites have a good CLS, against 89% of all sites. On Vue, 96% of sites use Google AdSense, and 89% of Vue sites have a good CLS.

FrameworkAd networks on its sitesPass all three

WordPress sites with ad networks 5,121 sitesGoogle AdSense 94%Google Publisher Tag (GPT) 16%63%

jQuery 4,865 sitesGoogle AdSense 94%Google Publisher Tag (GPT) 15%62%

Vue 467 sitesGoogle AdSense 96%61%

Google AdSense Google Publisher Tag (GPT) Prebid.js Header Bidding Taboola Amazon Publisher Services (TAM/UAM) Criteo Index Exchange Media.net

Does the framework explain the ad networks difference?

On jQuery, 53% of sites with Prebid.js ad networks pass all three Core Web Vitals, against 51% of jQuery sites with Google AdSense. Within jQuery, sites with Prebid.js and Google AdSense pass all three about equally often.

On jQuery, 74% of sites with Prebid.js ad networks have a good LCP, against 64% of jQuery sites with Google AdSense. Within jQuery, sites with Prebid.js have a good LCP more often.

Almost every site with Google AdSense ad networks is a jQuery site, and almost every jQuery site has Google AdSense ad networks, so the data can't tell Google AdSense ad networks and jQuery apart.

Almost every site with Google AdSense ad networks is a jQuery site, and almost every jQuery site has Google AdSense ad networks, so the data can't tell Google AdSense ad networks and jQuery apart.