Hello @claritabussy, STEM is the acronym for Science, Technology, Engineering and Mathematics.
As such only content that fall into any of those categories should carry the #steemstem or #stemng tag

Using the #stemng tag for content that does not fall into these categories can only be considered as tag-spamming. please endeavour to do the appropriate.

if you would like to learn more about #steemstem and #stemng, please feel free to join us on discord