New to Unity - Object Snapping?

Hello.

I have recently bought a giant Assets pack which has a lot of tiles that can be added together to create a map/level for a game. I am wanting to play around with these tiles to just see how Unity is and play around on a map with them.

I am however quite the newbie to Unity and I am wondering where the best place is to read about easily snapping tiles/objects together to create giant levels/maps using the asset tiles I bought.

Thanks in advance.