Do I need to include Bearer in the Authorization header?

Question

JavaScript

How to correctly pass and process the Authorization header in js + php?
Found this excerpt :

const http = axios.create({
  headers: {
    Authorization: `Bearer ${window.location.search.slice(1)}`,
  }
});

Why is the word Bearer here, so that later we can get rid of it on the back, if authorization is always one way?