"To create a poster" means to design and make a visual representation or advertisement on a paper or board, usually by using images, text, and graphics to convey a message or promote something. Full definition
• Create a poster for conveying a message effectively. (tes.com)
In another activity, students create a poster of pictures representing their ethnic heritage and culture. (gse.harvard.edu)
We also created posters with adoptable dogs in our area and talked to people about the importance of rescuing rather than buying dogs from breeders. (aldf.org)