How to have AdSense Ads match the content of the page?

We have a classified ads website.

We would like to display Google AdSense Ads based on the content and not on the user’s history/profile. It would perform way better and be more accurate to the users’ intentions.

Long time ago it was possible. Today it seems to be only possible with Google AdSense “Custom Search Ads”.

Is there a solution/possibility with Google AdSense “Ads”?