One annoying attribute of adware is to determine a user's purchasing habits and then show pop$-$up ads featuring items the user might want to buy. Social media platforms, search engines, and e$-$commerce sites do the same thing. Research the interaction between social media platforms, search engines, and e$-$commerce sites and how they track users and display targeted ads. In a few paragraphs, describe what you have discovered, and discuss whether you think this is helpful or harmful.