What is greenfield financing?

Excuse me, could you please explain what is meant by the term "greenfield financing"? I'm a bit unfamiliar with the concept and I'm curious to know how it relates to the world of finance and cryptocurrency. Is it a specific type of funding for new projects or businesses? And if so, how does it differ from other forms of financing? I'd appreciate it if you could elaborate on this topic and provide some real-world examples to help me better understand its significance.