can we use multiple heads

Answer 1

It's strongly recommended to have only one Head tag.
The HTML5 says that you code will be valid without Head.

In practise you'll see if your solution is going to work!

But my opinion is not to do it. There is a possibility to crash the DOM.

Answer 2

There can only be one opening and closing tag for html, head,body, and title.

You can add as many header,footer,aside,article,section, and nav as you need.

Answer 3

You can go for headings h1,h2....