Craigslist was founded in 1995 and has since expanded to over 450 cities in 50 countries. It is a classified advertising website that allows free listings for jobs, housing, and other items. While Craigslist generates revenue through these free listings, it also faces issues with scams on its site since it does not verify transactions. Some research has shown that Craigslist advertising can account for 40% of traffic to real estate listings and is a low-cost marketing option compared to traditional print ads.