Board Thread:Support Requests - Getting Technical/@comment-4723271-20170504012223/@comment-9605025-20170504175327

FYI, "#" is referred to as one of the following: The term "hashtag" comes from social media and refers to a specific method of adding tags to posts. The method is indicating text as a tag by preceding it with a hash symbol.
 * hash
 * pound
 * number sign

From Wikipedia:

Number sign

Hashtag