Goodwall is a social networking application for high school and college students to meet others around the world. The app allows users to share activities, achievements, opportunities and photos of beautiful places. It also enables users to participate in and contribute to events like cycling and hiking. The document discusses how the author applied to become an ambassador for Goodwall and was invited to a Whatsapp group for trial ambassadors to make a video about the app with a partner. The author is excited by the opportunity to improve their English by communicating with foreigners in the group who share pictures, poems and websites.