Caching plugins can help speed up the loading time for WordPress sites considerably. The cache will store a temporary version of the site that all site visitors will load, instead of querying the database each time a page is requested. There are several different versions of caching plugins available, but we particularly like and recommend WP Super Cache which is free to use.
Installing and enabling the plugin
Now that you've modified the permissions of your wp-config.php file, we can install and activate a caching plugin. In this example, we'll install WP Super Cache by going to the plugins page in our WordPress dashboard and searching for the plugin by name. Next, click Install Now, then Activate.
Next, visit the settings page for the plugin by going to Settings, then WP Super Cache.
Finally, enable caching by selecting Caching On then clicking Update Status.
Optional, but recommended setting for WP Super Cache
WP Super Cache is set up, but there is an additional setting you can enable to speed your site up even further. Get started by going to the Advanced tab in WP Super Cache's settings. From here, we would recommend enabling Compress pages so they're served more quickly to visitors.
After making this change, scroll down on the page and click Update Status.