Mobile app localization is a crucial aspect of producing a successful app, as it allows brands to connect with global audiences and increase adoption rates. By localizing an app's text for specific cultures and languages, developers can tap into new markets and expand their user base. The process involves identifying target audiences, choosing which locales to start with, hiring professional translators or localization services, and using tools like Instabug's SDK to provide a localized experience. Effective localization can lead to increased downloads, revenue, and user engagement, making it an essential step for brands looking to go global.