how we use Nav tag

Answer 1

Read this lesson and Kindly use search bar before posting duplicate Questions :
https://www.sololearn.com/learn/HTML/2199/?ref=app

Answer 2

The nav tag is used in html5 for a general navigation system, like to connect elements with the home page. Many times nav tag is placed inside header tag.
Here can we link like contact page, etc.
Hope I helped you 😄
For more you can read here:
https://www.w3schools.com/tags/tag_nav.asp
https://www.sololearn.com/learn/HTML/2199/?ref=app

Answer 3

For the anchor link in nav to function you can place the id in the href to navigate within the page. Or place links in the href to navigate between link.