What is a web Crypto API?

Excuse me, could you possibly elaborate on what a web Crypto API stands for? Is it some sort of tool or service that allows for the seamless integration of cryptocurrency functionalities within web applications? If so, could you give a brief overview of how it works and the benefits it offers to both developers and users alike? I'm particularly interested in understanding how it differs from traditional financial APIs and what sets it apart in the world of cryptocurrency. Thank you for your time and consideration.