Using your status as a speaker to promote others
Being invited to speak at an event confers some benefits. For newer speakers, the most obvious benefit of speaking is to advance your career. Speaking at an event confers a certain amount of legitimacy and status. The fact that you’re on stage and other people are listening to you implies that you’re somebody who deserves to be listened to; that your ideas hold value that the other people in the audience will benefit from them. This is a great thing to have in your back pocket at interviews, and is sure to impress the person doing the interviewing.