(Psychological / emotional perspective)
There is a need to put ourselves on the line and to be acknowledged for who we are.
If we ourselves are the subject of the advertisement, we should expect to be more upfront and open about our activities.
If someone we know is advertising themselves in our dream, we may have become aware that they have the ability to help us in our activities. Conversely, our subconscious may be alerting us to their need for help.