Mobile app localization is the process of customizing an app to serve different users in different regions with different preferences. It allows developers to increase their app's visibility and exposure, leading to a higher number of downloads and revenue. Localization can include text translation, image modification, video changes, audio adjustments, date format changes, numbers formatting, currency conversion, and more. Mobile app localization is essential for accessing global markets, increasing downloads, and expanding sales. It helps developers tap into huge markets that are mostly non-English speaking. The process involves selecting target markets, checking app analytics, reading app reviews, researching competitors, identifying markets' unique characteristics, finding translators, customizing text, handling non-string content, localizing app store content, using translation management systems, performing smoke tests, beta testing, releasing the app, and measuring results. Continuously updating localized versions of an app as it grows is also crucial in mobile app localization.