Your agent will try to «place» your book — i.e. sell it to a publisher. (publishingtalk.eu)
(He ran the analysis on himself and determined that, yes, he should be at M.I.T.) He founded a company to market the questionnaire and eventually sold it to publisher Harcourt, Brace & World. (scientificamerican.com)
I went Indie first and then, once a had a four book series with a some positive reviews, looked into selling it to a publisher. (madgeniusclub.com)