Notification When A Job is Ready Most of the printers that I work with send notification via email when a job is ready. In addition to that email, it may be worth considering sending a text-message to the customer at that time as well.
To Share Information About Specials Certainly, a business does not want every marketing initiative to be related to pricing specials and discounts. However, those can still be used from time-to-time to create buzz, garner attention, and increase sales.
To Gain Feedback After A Job/Project is Complete We all want to generate repeat business. To do this, we often have to reach out to customers after a job has been done, seek to get their feedback, and then offer/recommend other activities that we could help them with.
There's more detail about each point in the article, so Doc says check it out.