To manage ads on Facebook, you'll want to check out the ad preferences section. You can get there by clicking on the dropdown arrow at the top right corner of the page, then selecting "Settings" and clicking on "Account Settings". From there, click on "Ads" on the left side of the page. In this section, you can view and manage the information that influences the ads you see, such as your interests and advertisers you've interacted with. You can also block specific advertisers by clicking on an ad, then clicking on the three dots in the top right corner and selecting "Why am I seeing this ad?" or "Hide ad". This will give you the option to hide all ads from that particular advertiser. Additionally, you can also use the "Ad Preferences" tool to see which advertisers have uploaded a list with your contact information and opt out of seeing their ads.