I used to be an SEO 10 years ago, during the Matt Cutts era when "great" SEOs were determined by their ability to quote him left, right and centre.
I've since moved on to PPC and I'm not much up-to-date anymore on SEO. But I do know that it is still not dead!
In the 90s and 00s, it was all about keyword stuffing. In the early 2010s, it was all about links, especially guest posting for links. Then Google blacklisted guest posting and killed an industry. There were a few bird updates and I moved away about this time.
So could anyone briefly point out what's hot in SEO these days? Let's skip with the basics, because that will never change much (good content, site structure, bla bla).