What to do with recurrent content among pages and posts

Hi all,

I have a question. On a website that I’m building every page has a content block with share buttons and a content block with email subscription placed below the real text.

What HTML elements should I use for this? It is now automatically inserted between the <main> elements, and I really wonder if it should be IN the main element, since those blocks of content are duplicate among all pages. But if it doesn’t belong IN the main element, what should I use in that case?

Can you help me with your opinions and knowledge?

Kind regards,

Willem