"To contact the editor" means to get in touch with the person in charge of overseeing and making decisions about the content of a publication, such as a newspaper, magazine, or website. Full definition
For further information on any of the following breed publications, please contact the editors at the address listed below. (cfa.org)
This is a resume building internship where candidates will learn how to contact editors of major publishing houses as well as producers to consider our proposals for talent and titles we work with. (iliteraryagents.com)
Contact editors at those publications and ask if they would be willing to review your book. (susandaffron.com)