Abstract
To be most effective, fake news needs to be spread through social media to reach receptive audiences. In this section, we explore how bots and flesh-and-blood people spread fake news; how cookies are used to track people's visit to websites, create personality profiles, and show them fake news content that they are most receptive to. We also look at trolls, that is, people who set up social media accounts for the sole purpose of spreading fake news and fanning the flames of misinformation.