BMF.io publishers don't just care about how many people land on a page , they wanna know what users actually do once they're there. So, they look at stuff like how long someone sticks around, how far they scroll, and what they click on. Heatmaps show where people are paying attention, and they'll track things like shares, comments, and if users come back later. If there's a video, they'll check how much of it people actually watch.