If you enable ad personalization then they have an ad settings panel where they let you know what they think you're interested in. For instance, Google Ads thin

If you enable ad personalization then they have an ad settings panel where they let you know what they think you're interested in. For instance, Google Ads thinks I'm a married disk jockey living in Orange County who listens to pop and hip hop and loves bread making, aviation, and environmentalism. They let us turn some of it off, but there's no option to tell them what we like.