Firstly a predator, usually someone older than what they say, Starts chatting to a young person online over months to build a good relationship and trust, you both have the same hobbies, like the same clothes and live in the same country. They will then start to ask you very personal questions such as where you live, your school and your date of birth. Then you or them may ask to meet up, this is very dangerous but because you think you have gained their trust so you think it is 100% safe.