Image Compression (WebP & AVIF)
WebP and AVIF are modern image formats that reach markedly smaller file sizes than JPEG or PNG at comparable visual quality, and so directly improve the loading speed of a website along with Core Web Vitals such as LCP.
In practice
Both formats are supported by most modern browsers. The `` element additionally allows a JPEG or PNG fallback for older browsers, so that the speed advantage is used without putting compatibility at risk.