The best way to define “commercial” writing is to say what it is not.
It is not the writing of commercials. It is not print, radio, outdoor, digital, direct, or any other form of advertising that is the proper domain of a copywriter.
I am not a writer of commercials; that would be the domain of a copywriter, something I decidedly am not. Instead, I am what you might call a commercial writer, adept at writing a point-of-view letter or email, or a presentation for new business. I am expert at crafting strategy recommendations. I have substantial experience as a speech writer. I am good at descriptive material for a piece of collateral. I write solid web content.
I am, in short, good at writing for commerce, hence the term, “commercial writing.”
If you’re looking for someone to tackle a commercial writing assignment, by all means email me at firstname.lastname@example.org .