Images typically account for the greatest number of bytes downloaded when viewing a web page. Because of this, images are an area in which there’s huge opportunity to lower the size of a page, decrease load time, and increase performance. In this session, we’ll touch briefly on the basics of how to use the appropriate file types for images on a site. From there, we’ll dig a bit deeper and discuss methods to implement responsive images, browser-specific image formats like WebP, and how to optimizing responsive images further via lazy loading. Finally, we’ll go over building out a workflow for automating image optimization via WordPress’ built-in add_image_size function and task-automation tools like Gulp and Grunt.

See the full highlights at WordPress.TV.