"Do this not that" lists are always contextual and situational. Some of this makes sense in the context of a professional or business site, but make sure your goals align before taking the advice.

If you're writing on your personal blog then take all of this with the size of salt crystal you feel it deserves. Personally, that's about the size of an Acme safe hanging over a cliff waiting for an unsuspecting listicle writer^h^hcoyote.