WebP is a lossy compressed image format developed by Google. The WebP format typically achieves an average of 30% more compression than JPEG files at equivalent quality levels.

Google has been using WebP as its default image format on all their products since 2010. It was first introduced as a native image type in the Chromium browser and then was integrated into other Google products including Google+ and YouTube.

WebP is not yet widely adopted on the internet, but it has been gaining traction in recent years as it continues to outperform other compression formats.