As we discussed in Part one and Part two fully understanding Google RankBrain update is essential for modern SEO.
We understand that the only thing you can do is prioritize the signals that you put off for Google, in other words, we understood what things you must do to have an advantage in optimizing for RankBrain, but in essence, you can't really do anything technical like we've done for past Google updates, that's the beauty of the RankBrain update, it's kinnda blackhat proof.
optimizing for one single keyword per web page is pretty much over now, doesn't work as it used too and it is only to gets worse
you will need to have priorities when it comes to the signals I've listed in part two. For some subjects and niches, some signals will have more weight than others and your jobs is to figure out which ones you should prioritize.
Bottom line is that I hope you got a better understanding about this whole RankBrain fiasco and you are now ready to do modern SEO without wasting time on "stone tools technologies".