On top you see the groups for Texas Hold'em starting hands. You can click on the name to find more statistics for this category. There is also a more detailed table, where the groups are broken up into their suits.
The hand category All Starting Hands is broken up into the following 5 groups:
Pair, Two Big Cards, Ace and Little Card, Connected Cards and Other.
For more information about the numbers displayed, please read the Texas Hold'em notes.