WebP is an image file format created by the web performance team over at Google. Announced in 2010, support for this file format has been implemented into a number of current browsers including Chrome, Opera, and Android. Using this file format through your WordPress website can lead to a large reduction in both bandwidth use, and page loading times, making a more pleasing experience for the user. Two easy methods to implement WebP images into your website is to use the Optimus Image Optimizer or the WordPress Cache Enabler. So if you are looking for a good way to ease server load and increase loading speed without a loss of quality in your content, the WebP image file format might be a great place to start!
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How to Use WebP Files in WordPress & Decrease Page Load Times