A rich facial expression. Is enough sometimes to turn a game. A poker face is a facial expression that does not express any emotion, a facial expression that hides its feelings by making it appear blank or neutral. In Poker even when you feel the heat. A poker face is an essential when trying to hide flaws in your strategy or fooling other players in to folding when you possess an inferior hand.

In other words, the player is said to have a poker face, which means that regardless of his hand strength, he is completely emotionless and emotionless at the poker table.

This ability is a huge advantage when playing poker in person but of far lesser advantage when playing poker online.
But I suppose you could create a more intimidating avatar than the other guys to create the same dramatic effect.
Poker professionals attempt to remain expressionless during the game, so their opponents cannot guess their strategies or situations in the game. Poker players try to keep their faces completely blank so that no one can tell if their cards are good or bad. This adds a completely psychological aspect to the game.

Winning in poker is very important and it is important that the player provides as little information as possible about his hand. It is strategically advantageous for each player to keep his hand value secret. In our opinion this is where online poker excels in entertainment and excitement as its as luck and money are often beaten by face and conviction. In this way poker is a more even game. Financial advantage is of far less benefit than in other casino games.