No matter if you're submitting to an aggregator like Tunecore for digital distribution, directly to a digital distributor like Soundcloud, or even a music supervisor for consideration, it's imperative to have the following metatags filled in.
1. Name(s) of artist(s)
2. Names(s) of composers
3. Name(s) of performers
4. Song Title
5. Album title (if any)
8. Year Released
9. Track Number
12. Contact (yours/management)
13. Performing Rights Society Affiliation (ASCAP, BMI, etc.)
Mood and BPM might seem incidental, but they're really important for music libraries and music supervisors, so take the time and fill them in.
Yes, filling in all the metadata takes some work, but not only does it ensure you'll more easily get paid, but it will give your song a better shot at being placed as well.