Difference between the id and class selectors

Question

I'm trying to understand the two types of selectors.Can someone help me give a more clear explanation?

Answer 1

You use id only once.
Hope this snippet helps
https://code.sololearn.com/WRpw23sM9odk/?ref=app

Answer 2

id must be unique value in a file , applied to single time to a element where as class can applied to various tags as many times as you want...

Answer 3

Basically think of a house 🏠 = I'd
Which is basically the house address
And class is like who lives inside of it