WP Optimize was originally a plugin that could easily optimize your child site database and site images. In the most recent 3.0.0 release, WP Optimize now includes support for page caching. To access the site caching feature in WP Optimize, make sure you have updated the most current version. From the admin menu, go to; WP Optimize > Cache Which will show tabs for the following; Page cache Preload In preload, you can set how often the site will have site pages requested, so that those site pages will be cached. The preload in WP Optimize will create a cron