WebP

WEB-peenoun, image format

Topic: Building and running a site

1. A modern image format, created by Google, that makes photographs much smaller than JPEG or PNG files with little or no visible loss of quality.
2. Smaller images mean faster pages, which helps visitors, helps your Core Web Vitals scores and helps search. A transparent product picture saved as a 540 KB PNG can come down to around 30 KB as WebP. WebP also supports transparent backgrounds, and all modern browsers can show it. Keep the original JPEG or PNG as a master copy, because converting between formats repeatedly loses quality.

Example Converting the product photos to WebP cut the page weight by more than half.

See also Core Web Vitals Caching Alt text