On your client's website, there's an Activities category. Your client wants to make it clear that this site section is not about activities organized by other art societies—it's only about CORBA. So, you could change the name of the section to CORBA Activities, as explained in the following steps:
Navigate to Content | Category Manager and click on the title of the Activities section to open it for editing.
In the edit screen, change the Title to
CORBA Activities, as shown in the screenshot:
In the Alias field, remove the existing alias (remember, the Alias is Joomla's internal name for the article used to create user-friendly URLs). Leave this box blank; Joomla will fill it with CORBA activities when you apply or save your changes. You can check that now by clicking on Save. You will notice the Alias box is filled out automatically.
Click on Close. In Category Manager, the new title and alias are displayed.