Online stores automatically serve WebP images
WebP is a modern image format that provides superior compression for images on the web, with an average savings of over 30% in file size over traditional file formats like PNG and JPEG. Smaller images means faster download times and less network bandwidth usage, which both contribute to online store pages appearing to customers noticeably faster!
There are no settings or code changes required to take advantage of this feature. Lossless WebP is automatically available when using browsers that support the format.
Learn more about WebP from Google Developers support.