Online poker rooms are like any other poker room - they play the same decks, they buy and sell cards, and they have the same rules. But there is one huge difference. The biggest difference is the poker room's reputation. Online poker rooms get many complaints every day, mostly because poker of the negative view some poker room players have of online gaming.
Online poker is a controversial game. Many people say it exploits the mental abilities of its players. It also is often criticized for being a scam, or for people making too much money from gambling. There are even investigations into whether or not online poker is a "real" sport. But the overwhelming majority of people who play poker agree that it is a fun game, and that it provides a way for people to spend time together.