She works for an 'advertising agency' [=('chiefly US') 'ad agency'] in New York.
They are 'advertising' the new edition of the book.
These is a lot of 'advertising' in that magazine.
(..) I mean, that thing with the old man, that was pretty unexpected. Wish I could figure out some way we could break it up. You know, in advertising... I told you I worked in an agency? Some pretty strange people work there. Well, not strange, really. I guess it's just they have peculiar ways (..)1957 12 Angry Men