This document promotes Simply Postcards, a free app that allows photographers and studios to market themselves and showcase images by sending personalized postcards. It provides over 50 marketing ideas for using Simply Postcards, such as sending wedding photos to newlyweds on their honeymoon, following up with prospective clients, and notifying clients when photo orders are ready for pickup. The document also describes features of Simply Postcards like creating custom borders and scheduling future mailings.