Chat
Chat is the feature of online poker that lets players send text messages to each other.
The simple explanation
Most online poker rooms have a chat box beside the table. Players use it to say hello, wish each other luck, or comment on a hand. Many sites let you mute other players or turn chat off completely, and they ban abusive language. If you are new, read the chat for a while before joining the conversation.
A closer look
Chat has an etiquette and a tactical side. Rooms restrict talk about hands in progress, because it can help colluding players, and some forbid coffeehousing, which is talk meant to mislead opponents. Chat also tells you something about opponents: a player who complains constantly may be on tilt. Short forms such as AFK, BRB and BTW are common. Sites can review chat logs when they investigate abuse or collusion, so what you type may be read by support staff.
A practical example
A player types 'gl all' in the chat box at the start of a tournament. Later he types 'brb' and sits out while he takes a call.
Full explanation
Chat is the feature of online poker that lets players send text messages to each other.
Chat is a feature of most online poker games that allows players to communicate by typing messages. The messages appear in a box next to the table, and they are usually visible to everyone seated at it.
Sites set rules for chat. Abusive or offensive language is generally not allowed, and many sites also prohibit discussing a hand while it is still being played. This is mainly to stop players from sharing information in ways that help cheats.
Chat can also be a source of information or manipulation. Some players use it to goad opponents or to talk about their hand in order to mislead. That is related to coffeehousing. Players who are annoyed by the conversation can usually mute others.
Typical chat shorthand includes AFK, BRB and BTW. Used politely, it helps keep the table friendly.
On many sites you can also see automatic messages in chat, such as notices when a player joins or leaves the table.