Google Chrome has started targeting ads that drain device resources like network data, processing power or RAM. Chrome now blocks ads including those served via its own AdSense product. Chrome 87 is now available for desktop and mobile, according to user reports and our own tests. The feature is available on sample contents available on heavy-ads.glitch.me.org. You can test the feature on samples from heavy-ad sites like New York Times.com and Chrome for Android.com. The feature has been added to Chrome 87 for both desktop and Android.
Source: https://www.bleepingcomputer.com/news/google/google-chromes-high-resource-ad-blocking-spotted-in-the-wild/