Is it called a Index Page?

[93Corvette]

I just bought another vbulletin, and have installed in into a seperate directory called "forums".

What I want is to do is when people go to my website, they go to a main page (I think it's called a index page?). From there, they can choose which website they want to go to. Either forum1 or forum2. So I'm thinking I would need a hyperlink with a button on the main page to do this to redirect them to with actual link to the forums (ie forum1 or forum2).

But as a noob, I truly don't know what this main page would be called. I looked at Google for "Vbulletin Index Page" and all it shows in the main forum page. I'm looking for the main page before you get to the forum. Does anyone know a tutorial link, or even a vbulletin customer website that has this option of clicking one forum or the other?

This is my last step to connecting both of my forums to each other so others will have option at looking at the other web forum also....

Thank again in advance....