Answer the following question$($s$)$ using the following information.

Jenna dresses very stylishly using inexpensive used clothing. She finds various accessories online and puts together complete outfits that she markets on Poshmark, Facebook Marketplace, and Mercari for very reasonable markups. In a short period of time, Jenna has amassed over $90,000$ followers on Poshmark and has over $100,000$ followers on Facebook Marketplace. A large percentage of them share her posts and gain her even more exposure. She is now considering expanding her small online business by finding new clothing she can have drop shipped to the customers without ever touching the merchandise. Jenna does not advertise her products other than posting them online. However, she is wondering how she might advertise her products if she does try to expand.

Facebook Marketplace, Poshmark, and Mercari are all examples of $\_\_\_\_\_\_\_\_.$

consumer brand alliances

opinion leaders

online social networks

influencers

market mavens