Etiquette is the set of rules and manners that dictate behavior, both in personal and professional settings. Poker etiquette is the collection of norms and rules in and around the poker tables. If you don't know proper poker etiquette, you're bound to make obvious wrong moves and gaffes that can get you into trouble.
Omaha is considered, by some, to be the hardest game of Poker to master. Of all of the different games of Poker, Omaha is for many the hardest to learn to play and the hardest to bluff in. It is played most often at fixed limits, like Texas Hold'em and pot limit.