What is a probit link?

Excuse me, could you please clarify what exactly a probit LINK is in the context of cryptocurrency and finance? I'm not familiar with this term and I'm curious to know if it refers to a specific type of link or connection within the blockchain or cryptocurrency ecosystem. Is it related to a specific protocol, service, or tool that's commonly used in this field? And if so, could you elaborate on its purpose and how it's utilized in practical applications? Thank you in advance for your explanation.