I'm sure the dev can expand on this, but this is what i personally gathered by chatting in discord:

Developers will work on creating Zettelkasten - Decentralized Knowledge Management System.

Zettel, the coin itself, besides its use in Zettelkasten, can be used as a fast decentralized peer to peer cash.

The ever evolving mining algo ( about every 10 weeks ) will keep the coin CPU only mineable, which allows for true decentralization, where every person can run a node and mine with their CPU, which was the original idea behind Bitcoin. And this is the only coin I've seen actually actively doing something like this. While also having No permine or ico or any other type of scammy nonsense.