Craigslist began as a local email newsletter in San Francisco and is now one of the most visited websites globally. It allows users to post classified advertisements for jobs, housing, items for sale, and other services free of charge. Craigslist has expanded to over 450 cities worldwide and is organized into categories like "Sale" with additional subcategories for specific items. While initially a side project, Craigslist is now a nonprofit organization with a strong financial position, founded by Craig Newmark and Jim Buckmaster. However, fraud remains a major issue on the site.