The ads are personalized to you based on your browsing habits. You can click the x in the top right to stop seeing a particular ad, keep doing it and the system will learn.
Or it's someone using the same router. I get ads for women's clothing from high-end stores sometimes. I know who in my residence does shop at places like that a lot.
The Ad bots tailor to your browsing and a limited scan of the site content. I often get ads for cars, computers. The Army, watches and designer clothing. Because those are among my interest and sites I browse.
The ads are personalized to you based on your browsing habits. You can click the x in the top right to stop seeing a particular ad, keep doing it and the system will learn.