Step 1: Login to your cPanel account.
Step 2: Go to the ‘Optimize Website’ menu under Software section of your cPanel
Step 3: You can see the three types of radio buttons such as Disabled, Compress All Content and Compress the specified MIME types.
Step 4: Choose the ‘Compress All Content’ to enable optimization for all the website files.
Step 5: Choose the ‘Compress the specified MIME types’ to enable optimization for particular file formats.
Step 6: Click on ‘Update settings’ button to save the changes
Click here to view this article from Oryon knowledge base video tutorial playlist.