The phrase "new readership" refers to people who have recently started reading a particular book, magazine, or website. It means a fresh group of individuals who have become interested in that specific reading material. Full definition
They will feature your book deals on their site or send newsletters out to subscribers to help you reach a whole new readership. (indiesgogerman.com)
One strategy of indie authors is run a promotion that lowers the price of their eBook to 99 cents so it picks up momentum and gains new readership. (feedspot.com)
When you push past the limits, you find new readership that you didn't even know existed. (buildauthorplatform.com)