The profile responds immediately or looks to move the conversation. If you get your first message instantly after matching with someone or they look to move the conversation to a different application, it might be a bot.

How do you know if someone is real on Plenty of Fish?

Look for profiles with longer descriptions and proper use of grammar if you want to stay safe. Besides the short about me page, fake users also have only one or two pictures on their profile. When a profile seems too effortless, it is most likely fake. They will try to convince you to use other means of communication.