I understand what a deamon is, and I understand that snapd is a deamon that runs in the background.
Is the literal package manager that runs snap packs snapd? Is it a deamon, and if so, why? Why is the package manager that runs snapd a deamon? That seems weird to me. Why isn't it a normal package manager like flatpak or apt?
To the user, the package manager is a separate program, snap. It does have to tell the daemon about changes to the packages.
What it in fact does is talk to snapd and makes it start, stop or install containerized applications ("snaps").
Think about it like this: The snapd daemon is in charge of letting snaps run, and tools like snap and snapctl do things with the system and communicate with that daemon.
