Punctuation marks in corporate font:
Semi-Colon (;) separates major sentence elements. It can be used between two closely related independent clauses.
Comma (,) is used mainly to separate parts of a sentence such as clauses, and items in lists.
Em-Dash (—) explains, elaborates, can mark sharp turns in thought or helps add more information. It hooks sentences together with logical connectives. While it separates it also connects. It supports the continuation. Em-dash differs from other dashes not only in usage, but also in appearance. In fact, the em-dash is named after its length—it’s the same width as the capital letter M.
Colon (:) is used to precede a list of items, a quotation, an expansion
or explanation.
“They suggest rather than define. They rely on context (...).”