YouTube Go is one of the apps that's part of Google's effort to get the same information to people in developing countries while using a lot less data. There are other apps with the same concept: a lightweight version of an otherwise data-hungry app that offers the app's core functionalities while keeping tabs on data usage. The app is expanding to 130 countries around the world, so it's quite a big deal. The app is arriving in the Play Store in many countries in Central and South America, Middle Eastern countries, and part of Africa. YouTube Go first launched as a Beta product in India...
Source: https://www.gsmarena.com/youtube_go_expands_to_130_countries-news-29432.php