Several blog post pages

Hello, sanjanars.

Thank you for contacting us and for using our theme. We appreciate it.

You can achieve that, and it is actually a WordPress feature so it is not theme related. You can’t use tags but you can use categories to categorise your posts, then put those three categories to the Main menu and if one click on it, the page with all posts from that category will be generated.

This should help – http://www.wpbeginner.com/beginners-guide/how-to-add-topics-in-wordpress-navigation-menus/

If you have any additional questions, feel free to ask.

Kind regards.