Though poker etiquette doesn't really have much anything to do with strategy and winning the game, it builds your image and keeps the atmosphere on the table quite friendly. Regulating the behavior and manners of players on the poker table is more evident when you play on tournaments. There will be some specific guidelines that will be required to respect the other players in a tournament setting.
Another good idea why all players should observe proper etiquette while playing at a poker table is to avoid having all the other players gang up on you to take you out. It might sound funny, but there are times when one player pisses off everybody at the poker table due to poor etiquette that, one way or another, everyone picked on that player. Remember that multiple callers can break any hand.
Of course, there is a difference when we talk of proper decorum and etiquette on a live table or on an online poker table. That may be the case, the objective of all rules of etiquette is the same, and that is respect for the other players who are playing with you.
Here are the basic rules of etiquette that are important for all players whether online or on a live table game. These are all simple rules that anyone can follow. You'll notice that they all boil down to mutual respect for all other players.
Never trash talk or talk down any player on the table. Table talk is fine, but talking down somebody else is a big no-no on the poker table. At times you'll be annoyed, especially when you're an experienced/seasoned player and a newbie joins in and makes mistakes left and right. Just makes you want to give a word about correct play doesn't it? One good idea is to simply keep cool, stay away from the rough comments, and take advantage of the situation and win more.
Second basic rule is to always play on the proper turn. Beginners make up most of the people who make this mistake displaying poor etiquette. Doing things out of turn like calling or raising ruins other player's moves since you can discern a weak hand by their reaction. Unfortunately, doing this on purpose can be figured out quite easily and is a one way ticket to everybody picking on you to get you out of the game.
Last piece of basic etiquette is to never ever peek at another player's cards. This is really tempting whenever you get bluffed, but remember not to take a peek at those down cards.
These are the basics of poker etiquette. There are more rules to live by, but these are the ones you ought to start with. These rules of decorum help to keep a friendly atmosphere when playing poker.