"Social networking companies are aware of the problems that can be caused by fake accounts on their networks. That's why big social network sites like Instagram, Facebook, and Twitter offer official verification of accounts. A verified account has a badge check mark next to the name of a person or company, indicating it is verified by a real person as a real account. Below is a picture of four Donald Trump accounts on Twitter that all appear very similar. The account on the far left with the blue circle with a white check mark next to the name is the real Donald J Trump account. Facebook and Instagram also has a similar check mark for brands, celebrity, companies, and public figure pages."
Content taken from How do you know if an account is real or fake?
