User story: As a business owner (sponsor), I want to be able to easily find and connect with relevant YouTubers in order to efficiently promote my products or services through influencer marketing. With the YouMess app, I can search for YouTubers based on specific criteria such as audience demographics, content niche, and follower count, making it easy for me to find the perfect influencer for my brand. Additionally, I can easily message and collaborate with YouTubers through the app, streamlining the process of influencer marketing for my business.