Enables deferring the load of below-the-fold iframes and images pages until the user scrolls near them, without requiring actions by web developers. This helps to reduce network data and memory use, and may also increase site speed by prioritizing content that users are viewing. This feature is enabled for Chrome Lite Mode users only.
Web pages often have images or embedded content like ads out of view near the bottom of the page, and users don't always end up scrolling all the way down. With support for lazyload theses iframes and images can be deferred until user scrolls near them.
Docs: https://docs.google.com/document/d/1e8ZbVyUwgIkQMvJma3kKUDg8UUkLRRdANStqKuOIvHg/edit#
Explainers: https://groups.google.com/a/chromium.org/d/msg/blink-dev/czmmZUd4Vww/1-H6j-zdAwAJ