Give a secure shelter to your websites!
Think of a store. You require a space, either rented or leased, to set up a store so that the products can be displayed and general business operations can be carried out. Without space, customers cannot access the products and one cannot have a functional store.
Your website is like a store and web hosting is a rented or leased space, without which the websites will not have a place to stay and be seen by the web users.