It's hard to skip prototypes (or the prototype chain or prototypal inheritance) if you want to dive deeper into JS development (Not only pure JS, but also Node.js, Frameworks like Vue.js, React.js, Angular,...).
From the MDN documentation (don't be scared, we'll clarify everything below):
Refer back to the below illustration whenever you feel the need, it might help you to wrap your head around this concept easier.
[[Prototype]] prototype, which holds a reference to another object (or
null). This means, that our new object will have access to methods and properties of that referenced object.
What we will learn here will help us understand Object-oriented programming(OOP).
Prototypal inheritance is topic every developer should know. Learn about what prototypal inheritance is, how it works and how to use it.