Craigslist began as a community newsletter in San Francisco and has grown to become one of the most visited websites, hosting classified ads across over 450 cities worldwide. Each Craigslist site focuses on a specific community. While originally intended only for San Francisco, the popularity led to expanding to other cities starting with Boston in 2000. Craigslist executives believe the user community is key to its success by giving users a place to communicate and help one another. Though Craigslist faces challenges like scam artists, its simple and organized interface along with search functions appeal to a broad range of users.