I recently got tired of all the creepy targeted advertising, so I hit the nuclear option. Turned off all targeted ads on all social networks, cleared all cookies, all search histories, and installed the Disconnect Chrome extension. Also disabled all images in my email to stop those email trackers. I've always used an ad-blocker but I don't think that stops the data collection aspects of it. I've always known this is…
Credit cards, mortgage providers, retail stores, and car dealers all sell customer information on the open market. Every cell phone company out there knows what provider you have, stores knows what type of clothing you like to buy.
Wiping your computer clean prevents the ads from appearing on your PC, but the tracking of you is still taking place.