Final answer:
Sending magazines to customers' homes or making them available in stores are examples of circulation, which refers to the number of copies a magazine distributes.
Step-by-step explanation:
Sending magazines to customers' homes or making them available in stores are examples of circulation. Circulation refers to the number of copies a magazine distributes, whether through sales in stores, subscriptions mailed to homes, or other delivery methods. It is a critical metric for publishers to measure the reach and impact of their publications. While the Pew Research Center's Project for Excellence in Journalism has reported a decline in audiences for news magazines and a symptomatic shift towards digital mediums, traditional print circulation still maintains a significant presence, along with the advent of digital pay plans which have helped newspapers in particular to sustain their businesses.