(s) next to tag?

Question

Hello,

I was asking a question and was tagging it when I saw an s next to a particular tag. Normally it shows the number of questions associated with that tag.

So instead of:

tag (12)

Or some number, I saw the letter S, like so:

tag (s)

What does it mean? That the tag is soft-deleted?

Answer 1

The tag is a tag synonym for a master tag.