It has been like 10 years since I last learned how to html and css and all that. I am re-learning at the moment. In HTML5 there's these things I don't remember learning about

section, article, and aside

i'm curious to know if professionals actually use those, or if they stick with div tags

I remember it all being divs and css controlled to make that kind of thing happen

so I'm trying to figure out if I should get into practice using those tags, or if I shouldn't focus on them