A lot of means a large number or quantity. In this context, it refers to having many readers for your book or article.
Sentences with «lot of readers»
There are a whole lot of readers who shop at bookstores, airports, department stores, and convenience stores, and I'm not available in those outlets. (killzoneblog.com)
We had lots of readers ask for more information on various positions for breastfeeding twins. (lactationlink.com)
Too often new indie publishers think that getting lots of readers is in and of itself the point. (yuason.com)