Localization was important for Airbnb's growth because it expanded into many new countries and regions. As of 2015, Airbnb had listings in 191 countries, with over 500 million guest arrivals and 2 million guests per night. Translation at Airbnb was challenging due to the large volume and diversity of content to translate, as well as ensuring proper context and natural-sounding translations. Localization involves more than just translation and includes adapting content for different cultural contexts, languages, file formats and regulations. Good localization aims to provide a localized experience that feels tailored for each unique market rather than just a translated experience.