Sometimes we want to give people we talk to a benefit of the doubt. We do not want to dumb down our content or say (for us) obvious stuff out loud.
This usually backfires. People are more prone to stop you from talking when they know something already, than ask for more information if they do not understand.
It is important to try to always overcommunicate. Forget about what we know, and explain everything as if the person on the other side hears the information for the first time.
Provide context, explain why, communicate expected results, describe the road to the decision etc. Whatever is obvious to you will not be obvious to most.