"To run a contest" means to organize, manage and oversee a competition or event where participants can enter to win a prize by performing certain tasks or meeting specific criteria. Full definition
Generally we get people to give us their email address by running contests for free books. (eboundcanada.org)
Rather than running contests on social media platforms to collect new followers, think how you can use social media to reward your current loyal fan base. (entrepreneur.com)
We are running another contest where we giveaway a free e-reader to one lucky person, anywhere in the world. (goodereader.com)