What is the following key used for afterwards?

The "following key" typically refers to a specific key or command used in various contexts, such as computer programming, software applications, or gaming. It serves to execute a function, navigate menus, or perform actions within a system. Understanding its purpose depends on the context in which it's used, such as advancing to the next step in a process or triggering a specific response. If you provide more context, I can offer a more tailored explanation.