This was from The Far Side. The image depicts a broken window and a man reading a piece of paper presumably attached to the brick, with the note "Bricks thrown thru your window? Call Al's Glass" and then a phone number.

While searching for it I found the comic appeared as homework in a marketing class, with this wonderful student asking for help explaining the underlying marketing techniques:

https://www.chegg.com/homework-help/questions-and-answers/2-...