Source :- https://chrome.google.com/webstore/detail/google-sites/gmandedkgonhldbnjpikffdnneenijnd

HOW TO CREATE A FREE WEBSITE ?

Google Sites are free to build, host, and maintain with a Google or Gmail account, and there are no web hosting fees either.

 THERE are Two ways :-
  1. For Starter :- You can start up with a Blogger or if you want a website for your app or any other Product then follow my steps:
2.For Professional:- You can create through Wordpress and free domain.

FOR STARTER ....

STEP 1 - OPEN GOOGLE AND ENTER https://sites.google.com/new
STEP 2 - You will drop into website builder and a new project is generated.
STEP 3 - You should select a template and add domain ( how to get free domain and paid domain )
STEP 4 - Configure the template according to your design.
STEP 5 - Your website will be built just by pick and drop method.
see demo website:- ELITEGAMERS