Once your context document is saved or pasted, there is a quick test that tells you immediately whether it is doing its job.
Open a new conversation, either with the context pasted or with your settings active, and ask AI to write a short introduction paragraph about your agency using only the context document as its source.
Read it back. Does it sound like you? Does it reflect your clients, your specialisation, your voice? If yes, the document is working. If it sounds generic, or if it gets something wrong, that tells you specifically what is missing or unclear. Add it, refine it, test again.
This is the iteration principle from Module 1 applied to the document itself. Your context document is not finished on the first draft. It gets better every time you refine it, and a document you have been improving for six months will produce noticeably better output than one you wrote in fifteen minutes and never revisited.