WebP is a modern image format developed by Google. It compresses images much more effectively than JPEG or PNG—while maintaining the same or better quality. A WebP file is typically 25–35% smaller than a comparable JPEG. This improves website load times, thereby enhancing both the user experience and Google rankings. All modern browsers support WebP. WordPress has supported the format since version 5.8—however, a plugin or server-side configuration is required for the automatic conversion of existing images.