Help CenterTagging your music in metadata is very important in order to get searched and discovered.
Simply click your song on your profile page.
Next click the track metadata edit button near the left panel.
Click your mouse within the tag search box.
From here you can type in tags that are available. You can add additional tags as well by scrolling through the available tags. If you wish to search for tags, click below the tags added, then type to search.
Make sure to hit save, and you've not successfully tagged your music!