To build an audience means to attract and gather a group of people who are interested in and regularly follow a particular person, brand, or content. Full definition
This proved very useful in building an audience of people that are like - minded, which makes the interactions more cohesive during streams. (entrepreneur.com)
One of the best ways to do that is to build an audience on social, grow an email list and start making relationships with online influencers before you need them. (entrepreneur.com)
Many of the world's most successful bloggers have relied on the mainstream media to generate publicity for their blog to help build an audience. (entrepreneur.com)