Tracks Need a Description
Adding a description to your tracks is not just good practice. It actually helps make them more discoverable and gives your followers some extra information on them - they'll love you for it.
Don't think you have to write long, detailed descriptions. At least one or two sentences should do it. At first you will probably find it boring, hard or even awkward, but being able to write and talk about your music will help you a lot in the long run.
Extra things you can add are purchase links (Bandcamp, iTunes, Google Play etc.), album/mixtape name, genres, social links of the artists featured, website link, release dates, tour dates, and others. The description should be relevant to the respective upload and helpful/interesting for your followers, so keep them in mind when writing it.