What is zigzag algorithm?

Excuse me, could you please clarify what exactly is meant by the term "zigzag algorithm"? Is it a specific type of mathematical or computational method? Or perhaps it's a strategy employed in a particular field, such as finance or cryptography? If so, how does it work and what are its main purposes? Additionally, are there any notable examples or applications of the zigzag algorithm that I should be aware of? I'm quite intrigued by this term and would appreciate any insights you can provide.