Hey, the steemstem tag is for the promotion of STEM related subjects. If you want to use this tag and be discovered by the curators please follo the guidelines. Here are the steemstem guidelines.
https://steemit.com/steemstem/@steemstem/being-a-member-of-the-steemstem-community
Please follow the guidelines if you want to post under the steemstem tag. Cheers!