In the Deuces Wild version of Video Poker, all deuces are treated as wild cards.  This means that whenever you get a 2, you can use that card as any card you like.  You can therefore change it's face value and/or suit to work with the hand you have.  With Deuces Wild, you have a far better chance of getting good hands.  The casino compensates for this by offering a tighter payout schedule.  You only get paid with a three of a kind or better.

Below is a typical payout schedule for Deuces Wild: