Advertising dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Garuda

Vision: Looking at an advertisement: be cautious about a deal you are offered—it could be a trap. Advertising something: you are not getting the applause or understanding you expected.

Depth Psychology: Something from deep in your unconscious is trying to get your attention. Maybe you have chosen to ignore or suppress it? See Poster.

Source: Dreamers Dictionary Author: Garuda

Interpretation 2 — Gillian Holloway

It is a portent of a change in your method of making a living to dream that you insert an advertisement of any kind in a newspaper or other periodical.
Source: The Complete Dream Book Author: Gillian Holloway