Writing down things you want to reference later. However, it goes far
beyond note-taking. There are many apps that let you externalize your
thoughts.
In order to get them out of the human brain, or for easier reference later, or
as it helps logical thinking, and can serve as a reference point in case
one gets asked why they do certain things.
Forgetting is inevitable. Digital or physical storage is more reliable than our brains.
Maybe it's the consequences pessimistic or societally unusual ideas
have.
Being with yourself is the only time when all the information can be
your true thoughts, not a version which you think societally fits…
Your choice though. If this paradoxically wants you to share something, please
do as your free
will wants. I have no say in that.