meet. >> reporter: teresa payton spends her days in cyber security and runs fortalice solutions. we all shop online every day. >> we do. in this case, we start off on google search, go to a retailer an look for black boots and end up on macy's. the trackers wake up, start to look at what are you looking senate how long are you on the web page? >> reporter: 24 third parties tracked looking for black boots? >> that's right. just from google and macy's. >> reporter: those third parties are gathering data using to market it to us or selling web habits and then check the news of the day and there's the ad. >> they track you. they know you. they know you're searching for boots. >> reporter: 96 third parties are tracking us? >> that's right. that's after only visiting four sites. >> reporter: 96 third parties after visiting 4 sites. >> every swipe of the finger,