Online poker is a fast-paced game where any edge you can get is critical. This is why players use software like Poker Copilot to collect data on their opponents, even when they are not playing. The accumulated data helps players find the mathematical errors in their opponents’ games, and exploit them.

A great online poker site has high player traffic numbers, which means that there are always active games you can play in. The larger poker sites have the highest player traffic numbers, which also ensures that they are secure and that you can always find games to play.

In addition, a good poker site will offer a variety of poker tournaments and cash games. It will also offer generous bonuses. Some sites will return some of the money that they take from pots to their players, which is called rakeback. This is a big incentive for many players, as it is essentially free money.

It is important to choose a poker site that has the right kind of license for your jurisdiction. Different European countries have different licensing requirements, and you should only play on a site that has the proper licence for your country. For example, in the UK, a poker site needs to have a license from the UK Gambling Commission to be trustworthy. It is also important to check the reputation of an online poker site before making a deposit. This is because there are scammers out there, and a reputation for fraud is not something that any poker site wants.