How to use format(), an in-built function in Python

I have been studying Python for a year now in an attempt to learn data science and other methodologies in this field. I had learned the inbuilt print() function early on in my studies, as the first program that any Python student makes is to print the words “Hello World” onto the screen. One thing that I was not very sure about, however, was the format() function, so I refrained from using it.