Start by checking what real engagement looks like. Look at recent posts and read the comments to see if they sound natural and not repeated. Compare the number of likes to the number of comments and saves; extreme mismatch can mean fake numbers. Ask for reports from their analytics that show where their audience comes from and when they interact. Use small paid tests before a large deal to see if real followers respond. Work with creators who agree to a short trial post or an affiliate link so you can track real clicks and sales. Which of these checks do you think would be most useful when choosing an influencer?