Punctuation

No comma is necessary before an ampersand even if it is the serial comma before the last item in a list.
The Oxford comma should be used. An Oxford common is the last comma in a list and goes before the “and.”
No comma is necessary before “Jr.,” “Sr.,” or any numeral suffix.
There should only be one space after periods and colons.
Commas and periods are placed inside quotation marks; colons and semicolons are placed outside. Depending on meaning, question marks can appear either inside or outside quotation marks.
No space is needed between dashes or slashes and surrounding text.

Brand Style Guide