If you select TikTok or Facebook/Instagram as a store in one of your releases, users can use the tracks it contains in their videos, stories, reels, etc.. This not only increases your reach, but you also get paid for it. Both Facebook / Instagram and TikTok pay for the views and the creations, i.e. the amount of content created with your music. So it's not just the number of views that counts, but also how many videos, stories, reels etc. your song is used in.