What is slipstream technology?

Could you elaborate on slipstream technology, please? It's an intriguing concept that I'm not familiar with. I understand it has something to do with enhancing performance or efficiency, but how does it actually work? Is it a new breakthrough in the field of engineering or has it been around for a while? Are there any specific industries or applications where slipstream technology is particularly useful? I'd appreciate it if you could provide a concise yet informative explanation of this technology.