The default page is the main page or the home page of your wedsite. It is the first page that will be displayed when someone visits your wedsite.This cannot be deleted nor hidden; however, you do have an option to replace it. Here are the simple steps to do this:
1) Click on the page that you want to assign as the default page.
2) Click on the drop-down arrow for Page Options to expand the box.
3) Uncheck the This page is visible to your family and friends. And check the Make this page your default page (if it's hidden it will be made visible).
4) Once it is checked, it will automatically replace the default page.