These are the rankings of the hands from hightest to lowest.
Five of a kind - Five of the same cards. Can only be used when there's wild cards in the game. Example: 5 Kings
Royal Straight Flush - An Ace high straight all of the same suit. Example: Ten, Jack, Queen, King, Ace of all Hearts.
Straight Flush - A straight all of the same suit. Example: Seven, Eight, Nine, Ten, Jack of all Hearts.
Four of a kind - Four cards of the same rank. Example: Four Jacks.
Full house (Full boat) - Three cards the same and two other cards the same. Example: Three Ace's and two Eight's. Called Ace's over Eight's.
Flush - Five cards of the same suit. Example: Two, Four, Five, Ten, Jack of all Spades.
Straight (Run) - Five cards in a sequence but in different suits. At least one card must be of a different suit than the others. Otherwise it'll be a Straight Flush. Ace's can be high or low. Example 1: Ace, Two, Three, Four, Five. Example 2: Ten, Jack, Queen, King, Ace.
Three of a kind - Three cards of the same rank. Example: Queen, Queen, Queen, Ten, Seven.
Two Pair - Two cards the same and another two cards the same. Example: Jack, Jack, Ten, Ten, Five.
One Pair - Two cards the same. Example: Five, Five, Six, Ten, Jack.
High card - When you don't have any of the above, the highest card determines the hand with Ace's as high. Example: Two, Three, Nine, Jack, King. The King is high in this example hand. It will be beaten by someone who has an Ace.
These are ranked starting from the lowest.
Basically terrible hands. Aces are low. Compare starting from the highest card going down.
Perfect low (unless using the Wheel) - Six high. Example: Ace, Two, Three, Four, Six.
Low - Like High card above except for the Ace. Start with the highest card and work down while comparing with other hands. Example:
Hand 1 - Ace, Two, Four, Five, Nine.
Hand 2 - Ace, Two, Three, Nine, Jack.
The first hand would be lower since you start first with the highest cards in each hand and the jack in hand 2 is higher than the nine in hand 1.