In this video, I show you 3 places in Power BI where you can add documentation.
Creating documentation is often not the most pressing thing on your mind when creating a new report. It's not immediately obvious what the advantage is and there always seems to be other more interesting ways to spend your time.
I always look at good documentation as a gift to my future self. Many times I've picked up a report and spent too much time trying to get to grips with the data sources, the Power Query transformation steps, and the DAX code I've included in measures and calculated columns. Even though it was me who wrote this report in the first place!
Good documentation takes a bit of extra time but is a proper time saver. Creating some simple documentation also helps you to ensure you really do understand what is happening with the data and calculations in your reports - you can't document what you don't fully understand.