Let's say I have a site that sells something. A user has no idea that my site exists, but they visit a competitor website which adds a cookie to their browser. Can I display advertising for my site to this user on the web based on that cookie? Via an ad network for example?
I realize it seems like a simple thing, but I just want to confirm that this type of targeting is not restricted to RE-targeting, where I show users an ad based on a cookie that came from MY site.