Craigslist is a classified advertisements website that hosts listings for housing, jobs, items for sale, services, and forums on various topics. It started as a local newsletter in San Francisco but now hosts classifieds for over 450 cities worldwide. Users can post listings in numerous categories and include photos. Craigslist has a large network of users, hosting over 25 million new ads, 1.5 million job postings, and 30 million visits per month. While it only has 25 employees, Craigslist generates millions in annual revenue from its classified listings.