What does the term "poker all in" mean and when is the best time to go all in during a game?

The term "Poker all in" means betting all of your chips in a single hand. The best time to go all in during a game is when you have a strong hand and believe you have the best chance of winning, or when you want to bluff and make your opponents fold. It is a high-risk, high-reward strategy that should be used strategically.