This document discusses various ways to say goodbye in English for different situations. It provides over 15 phrases that can be used casually with friends, formally in business, or when parting for a long time. The phrases range from informal ones like "bye", "later", and "peace out" to more formal options like "farewell" and "have a nice day". The document also gives examples of appropriate contexts to use different goodbyes and emphasizes choosing phrases based on regional customs, situation, and audience to ensure successful communication.