Start screen is flexible and advanced comparing to the old Start menu. This is another simple feature that will ease your life. Now you can pin your favorite website to start screen and access them straight from Start screen.

Step 1: Go to the Metro Internet Explorer 10 and open the web page.  Click on the Pin to Start which appears on the bottom bar.

Step 2:  A popup window will appear. Type the  website name which you want to display on the Tile and click on the Pin to Start.
    

Step 3: Go back to the Start Screen. You can see the Metro Internet Explorer Tile with the given name.

You can also add all the pinned websites to a separate group or groups.