Amazon.com provided a new way for customers to buy books online that was more convenient than traditional bookstores. The number of internet users was growing rapidly in the late 1990s, allowing Amazon to become the leading online bookseller by offering a wide selection, reviews from other customers, and ease of purchasing books from anywhere at any time. While Amazon faced challenges from competitors and keeping costs low in the early years, it grew exponentially through the late 1990s and expanded its product offerings beyond books, becoming one of the largest online retailers in the world.