A zettel with the role “zettel” is typically used to document your own thoughts. Such zettel are the main reason to use the software Zettelstore.
The only predefined zettel with the role “zettel” is the default home zettel, which contains some welcome information.
You are free to change this. In this case you should modify this zettel too, so that it reflects your own use of zettel with the role “zettel”.