The phrase "promo days" refers to a period of time when businesses offer special promotions or discounts on their products or services to attract more customers and increase sales. Full definition
But few — only 26 % — that use free promo days actually buy advertising to promote those days. (authorimprints.com)
I got 3,000 + downloads during the first 3 free promo days where I used all of the above three paid promo services. (robcubbon.com)
To use scarcity marketing for more downloads, here's the first thing to remember: Don't use all five of your free promo days at once. (wiseinkblog.com)