It's always a good habit to debug your website before you publish it, just in case some error or resource missing cause the bad user experience. If something goes wrong or your site performance is very slow, you should also check which part has problems. 

Kooboo provides a powerful built-in diagnosis tool, it will allow you to scan a lot of places which may usually cause a problem or bad performance. To use the diagnosis function, simply click the 'Diagnosis' button on the main navigation menu.

In the work area, you will see some checking items. Just pick the items which you want to scan and click 'Scan now'. 

After a few seconds, Kooboo will generate the report to show you how many issues. Depend on the issues, you can work on the related solution.