Here's who is retargating you with skyscraper-type banners.
Click to see other adsRetargeting is used to reconnect with people who visited a website. It is also called remarketing or behavioral marketing. This form of marketing allows website owners to show banner ads based on your previously visited websites.
Interest based marketing can get very annoying when there are specific banners that follow you around. The easiest way to stop this kind of ads is by opt-ing out here