1. Log into your cPanel account.
2. In the "Databases" section, click on "phpMyAdmin" Icon.
3. In left side-bar, Click on the expand button to expand database like "example". 
4. Under your cPanel username, you can see list of all databases. Select appropriate database which you want to optimize.
**5. **Scroll down and mark "Check All" then click on the Drop-down option and select "Optimize tables".
Table successfully optimized.