Improve the real or perceived speed of the site, or monitor performance metrics.
Ensure images are natively lazy-loaded by browsers supporting the loading='lazy' img attribute.
Generate a preload script for PHP 7.4's opcache.preload setting.
There are some newer vitals (Largest Contentful Paint, First Input Delay, Cumulative Layout Shift) that are being tracked by Google, more information can be found here:
Provides integration with the Compressor.js JavaScript library