Simple and clear communication is Similar to having a strong, healthy mindset in that it is a completely unsexy but fundamental aspect of a thriving career in music!
If you are lucky enough to have learned how to assertively, effectively, clearly and kindly communicate with anyone, about anything, and in any situation, that is wonderful, and you definitely won't need to read this guide!!
But for the rest of us, like any other skill, communication can (thankfully!) be learned.