Display Ads on New Website

What are the ads called that can be seen only at the bottom of a website/webpage? (Just like a horizontal bar at the bottom of a page which I think really does not affect the user experience) And which ad network will be better for a new publisher for those types of ads? Which will not affect user experience or affect site speed.

• This topic was modified 2 years, 1 month ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic

The page I need help with: [log in to see the link]