A WebP file is an image format developed by Google. It uses both lossy and lossless compression techniques to achieve significantly smaller file sizes compared to older formats like JPEG or PNG while aiming to maintain comparable image quality. Essentially, it works by intelligently removing or simplifying data redundant to human vision or utilizing more efficient algorithms to represent pixels. This makes it distinct by specializing in efficient web delivery.

Primarily, WebP is used to optimize images on websites, leading to faster page loading times and reduced bandwidth usage. For example, an e-commerce site might convert product thumbnails to WebP to improve store performance. Content management systems like WordPress support WebP, and tools such as Adobe Photoshop or XnConvert allow users to create and edit these files.

The major advantage is the substantial reduction in file size, which boosts web performance and lowers data costs. However, limitations include some legacy browsers (like older Internet Explorer versions) lacking full support, and not all software seamlessly handles WebP outside browsers. As browser support continues to improve and the demand for faster web experiences grows, WebP adoption is becoming increasingly widespread for web images.