Ad networks on WordPress sites and the Core Web Vitals

Sites with Prebid.js ad networks pass all three Core Web Vitals most often: 57%, against 60% of all WordPress sites. The biggest gap is LCP, 82% against 76%.

Sites with Prebid.js ad networks have a good LCP most often: 82%, against 76% of all WordPress sites. Sites with Google AdSense ad networks have it least often, at 73%.

Sites with Google AdSense ad networks have a good INP most often: 99%, against 100% of all WordPress sites. Sites with Prebid.js ad networks have it least often, at 98%.

Sites with Google AdSense ad networks have a good CLS most often: 72%, against 78% of all WordPress sites. Sites with Google Publisher Tag ad networks have it least often, at 67%.

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): 639 ms median for Prebid.js against 1042 ms for Google AdSense. Overall median field LCP is 1.6s for Prebid.js (TTFB 639 ms, load delay 405 ms, load duration 154 ms, render delay 236 ms) versus 1.8s 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): 639 ms median for Prebid.js against 1042 ms for Google AdSense. Overall median field LCP is 1.6s for Prebid.js (TTFB 639 ms, load delay 405 ms, load duration 154 ms, render delay 236 ms) versus 1.8s 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): 639 ms median for Prebid.js against 1042 ms for Google AdSense. Overall median field LCP is 1.6s for Prebid.js (TTFB 639 ms, load delay 405 ms, load duration 154 ms, render delay 236 ms) versus 1.8s 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): 639 ms median for Prebid.js against 1042 ms for Google AdSense. Overall median field LCP is 1.6s for Prebid.js (TTFB 639 ms, load delay 405 ms, load duration 154 ms, render delay 236 ms) versus 1.8s for Google AdSense.

On jQuery, 94% of sites use Google AdSense ad networks, and 60% of jQuery sites pass all three Core Web Vitals, against 60% of all sites. On Vue, 96% of sites use Google AdSense, and 57% of Vue sites pass all three.

On jQuery, 94% of sites use Google AdSense ad networks, and 75% of jQuery sites have a good LCP, against 76% of all sites. On Vue, 96% of sites use Google AdSense, and 75% of Vue sites have a good LCP.

On jQuery, 94% of sites use Google AdSense ad networks, and 100% of jQuery sites have a good INP, against 100% of all sites. On Vue, 96% of sites use Google AdSense, and 99% of Vue sites have a good INP.

On jQuery, 94% of sites use Google AdSense ad networks, and 77% of jQuery sites have a good CLS, against 78% of all sites. On Vue, 96% of sites use Google AdSense, and 75% 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%60%

jQuery 4,865 sitesGoogle AdSense 94%Google Publisher Tag (GPT) 15%60%

Vue 467 sitesGoogle AdSense 96%57%

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

Does the framework explain the ad networks difference?

On jQuery, 59% of sites with Prebid.js ad networks pass all three Core Web Vitals, against 54% of jQuery sites with Google AdSense. Within jQuery, sites with Prebid.js and Google AdSense pass all three about equally often.

On jQuery, 82% of sites with Prebid.js ad networks have a good LCP, against 72% 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.