Those websites list chat rooms of beautiful women who are live on webcam. Xchatz.com has a great review of cam girl websites. Some websites count non-nude and sexual categories. Whatever the category, you can chat with a beautiful woman in a text chat or in a cam2cam. A text chat means that you will type your text on your keyboard and she may answer either by typing her text or talking aloud to you via her webcam. In a cam2cam mode, you can activate your webcam and she can hear or see you. Note that sometimes, you can just switch on your audio if you don’t want to be seen.
Some cam girl websites are more sex oriented. Some of them feature chat room where women perform live sex show in public. Consequently, you can attend a live sex show for free in a chat room. Then, you can also tip the cam girl if you want to direct the live sex show. It is cheaper than a private chat with a cam girl but it lacks intimacy. Xchatz has a price table of private chats. Nevertheless, it is fast and simple. You tip a camgirl and she starts to get naked.
Some cam girl website are better for private chats. Some cam girl websites are better for instant live sex chats. It depends on what you are looking for. Maybe you prefer to chat with a cam girl (this includes roleplay), maybe you prefer to ask her to do a live sex show for you.