I should qualify the comments I am about to make with the remark that, in most cases in which an em dash is employed, it is technically correct. Most grammar and punctuation guides regard it as ...

Hyphens, en dashes, and em dashes are frequently tested punctuation marks in government exam descriptive writing papers. Hyphens connect words, en dashes show ranges or relationships, and em dashes ...

According to Merriam-Webster — yes, I’m purposefully being cliche, the em dash can be used to separate extra information in place of a comma, colon, or parenthesis. Google Docs will now autocorrect ...