Basically socialism but with control in the hands of people instead of centralized power in the state. The state sets up systems that discourage exploitation and keep wealth from being concentrated - mostly in terms of breaking monopoly power, enforcing worker's rights, and reforming the money system (new basis of currency, negative interest rates) such that wealth distribution is implicitly encouraged. But the actual governance of the structures is put in the hands of the people rather than the feds - co-ops, worker unions, community councils, etc. As much as possible power is delegated to the people most directly affected, with feds only stepping in to regulate the decisions that affect the whole country.
It has the goals that libertarians claim - to make people as free as possible and as free from exploitation as possible - but it actually works to remove exploitative structures rather than allowing the status quo by which the powerful have all the advantages to exploit the weak.
I don't talk about it much because it's not really something that can be implemented on a small basis - you need to make major changes to the structure of our system first or it won't work. Primarily, you need to change the basis of currency so that it is no longer based on loans at interest, because that is the central structure that dictates the constant competition, overproduction/overconsumption, and wealth accumulation that fukk our system up
Libertarian socialism - Wikipedia
I was introduced to the whole concept via the economist Silvio Gesell and the writer Charles Eisenstein
Silvio Gesell - Wikipedia
Sacred Economics: Introduction - Sacred Economics | Charles Eisenstein