[WP8.1] what does three column start screen means?

[DBZo07]

3 column start screen is to be found to be coming on 8.1 update.
Please tell me what is that?

 

[boshkop]

3 large tiles (instead of two) horizontally on your start screen.

 

[DBZo07]

Thanks, i hope 625 will get this feature.