You will see in your site menu that the Home page has a ‘home’ icon on it. This designates it as the Homepage for your site and means that search engines will look for certain elements on this page in order to rank you for SEO.
You can rename your site pages any way you like but in order to make a page into the Home page, you need to go to the page settings.
Then, at the bottom of the page, select Set as Website Homepage then Confirm.
Now, when you go back to your Navigation Menu, you will see your new page with the ‘Home’ icon.
Make sure you change the name of the page.