My current understanding of SEO is this: One of the ways Google determines a webpage's quality is by how many people click back onto the SERPs. For example, if loads of people click onto your blog after searching "inception explained" and 0% of them click back, then Google will be more likely to rank your page highly.
So this got me thinking: should you optimise your website for "abducting" visitors? By that I mean, do "Related Posts" tabs work well because they draw people away from the thing they were searching for and make them less likely to click back out of your website? And if so, would adverts not also have the same effect?