This question already has an answer here:
During the last semester, I had some Prolog courses and I look topics on StackOverflow to help me during my praticals work. I have noticed that SO shows on the homepage more and more questions about prolog. The same behaviour occurred with wpf (I had a project with this too), but it's less dramatic.
My question is simple: does StackOverflow (and SE sites in general) show questions on the home page according to a user's visit history, in addition to favorite tags? I never answered any questions about prolog or wpf, so I don't think it came from my answers and I never saw a prolog question on my homepage before.