Poker tells are outward and readable telegraphing messages usually subtle as well as unintentional. In some cases the telegraphed poker tell is employed as an attempt to compel an opponent to misread, committing a costly error and therefore capitalized on by the teller. On average poker tells are considered to be unintentional as well as costly errors made by opponents that must be capitalized on.
An example of a poker tell would be card guarding, checking own and, or the opponents chip stack, as well as the more obvious loud, or belligerent talk, these are but a few among a variable plethora of others.
Poker tells, or telegraphing describes a player’s outward response to game play no matter how subtle which may be possible to be read by other players.