The tiles have no intended function since it is you, the developer, that define what is inside them. We don't know what you will put inside them. It can be absolutely anything and only you know what it will be. You can place anything in the tiles. So if you place a button or a hyperlink you can do anything when the user clicks them -- for example navigate to somewhere else. You are free to place any controls and wire any custom logic behind them.
The tile list simply manages the positioning and ordering of tiles on the screen -- it does not care what is inside those tiles because only you know what is inside them -- we don't know.
For more information on how to define the template of the tiles please check the online documentation.
I hope this makes sense.
the Telerik team