SmithMusic.com adds your audio to YouTube’s Content ID system, which scours YouTube for videos that use your music. When a match is found, ads show on the video and you’ll get the ad revenue.
If you have a video on YouTube that uses your own music, you’ll likely get an email from YouTube that there’s been a copyright claim against it. This is nothing to worry about–it’s YouTube’s ContentID system doing its thing. You can safely ignore the message. Ads will appear on your video & we’ll send you the money earned.
If you want to allow specific videos to use your music without Content ID claims, you can do so here.