This page is automatically generated by WordPress and it's your listing archive. There are some options you can set about this page under different menu voices.
You can set a listing item as "featured". This will take it on top of the archive listing page. In order to set a listing as featured, go to Dashboard → Listings → All listings → Edit → Listing options → Additional info.
You can set the number of listings you want to show per page. This will affect on the pagination of your archive page listing.
Go to Dashboard → Theme options → Listings and set the number.
You can set a description for a specific archive listing page. For example, you can set a description for the "Activities" category archive page. In order to insert it, go to Dashboard → Listings → Categories.