How does two pair work in poker and what is the best strategy to play it effectively?

In Poker, two pair is a hand with two sets of matching cards and a single unrelated card. The best strategy to play two pair effectively is to bet confidently and aggressively, as it is a strong hand but can be beaten by higher hands like three of a kind or a full house. It is important to consider the community cards and your opponents' betting patterns to determine the strength of your two pair and make strategic decisions accordingly.