It makes sense to use a CDN service only if your WordPress site uses a lot of images, file downloads, or videos.
You can enable it via our Dashboard/Portal very easily:
Using the Pressidium Dashboard
Select the Websites menu option from the Dashboard sidebar.
Click on your website's name to go to the website overview.
Verify the environment to apply the change, by checking out the currently selected environment in the navigation bar. CDN service can be enabled for the Production environment only.
Click on the Settings menu.
Switch on CDN in the CDN section. A confirmation modal will appear.
Click Enable CDN to send a request to our support team to enable CDN for the website.