When you are in the showbiz industry, you are exposed to many people, and when people become your fans, they want to know more about you. The actor has to display all about his/her career from scratch. To know through social media is not enough for the fans. You have to be on this giant website where people mostly come searching. Through Wikipedia, your fans can get to know about your history, your relationships, your success, your failures, and your life stories.
Wikipedia is reliable in terms that it secures the actor's information. It's a great tool for the popularity of celebrities as your content reaches a larger audience, not just your fans. People from all over the world recognize you. Wikipedia helps you in branding and making a name in the digital realm.