The ads are going to be personalized, which at this point seems to be standard practice and necessary for good revenue. This means that, based on other websites you visit which also serve ads, the ad company creates an anonymous profile of your interests, and tries to show you ads you're more likely to be interested in. This is also called "tracking" of users, which makes it sound slightly more ominous than what it really is.
Nope. Screw off.