In regards to the attendee that asked about section or article here is a GREAT link:
For the woman who asked about HTML section vs article in @natedriver 's session, this post by @iandevlin might help. https://t.co/FkE0qJnrTQ #WCCincy
— Deborah Edwards-Onoro (@redcrew) November 12, 2017
Here is a list of SEO people to follow on Twitter (in no particular order):