Copilot is just an autocomplete tool, it doesn’t have much support for multiturn prompting so it’s best used when you know exactly what code you want and just want it done quickly like implementing a well defined function to satisfy an interface or refactoring existing code to match an example you’ve already written out or prefilling boilerplate on a new file. For more complex work you need to use a chat interface where you can actually discuss the proposed changes with the model and edit and fork the conversation if necessary.