"Trad pub" is a short form of "traditional publishing," which refers to the conventional way of publishing books through established publishing companies. Full definition
There are too many benefits to self - publishing for trad pub authors to ignore forever. (authormarketinginstitute.com)
To praise the (so - called) glories of trad pubs in an article so rife with technical mistakes is hubris at its worst. (goodereader.com)
Assisted self - pub: This is for the folks who are interested in trad pub because of the cover design, editing, and formatting. (elizabethspanncraig.com)