The document consist of the details with screenshots of whole process which defines how to place order through GoogleCheckout in ecommerce.
Necessary steps for understanding the process
1. In OfBiz Area
* First go to E-Commerce application you will have landing page for selecting feature products. Choose the product for adding it into the cart.
* After adding product in cart we will see the following screen with google checkout link. 
* After clicking on Google Checkout link system will connect you to the google server. It carries shopping cart information, shipping methods etc to the google area. Now the further assistance will be provided through google.
2. In Google Area
You will be redirecting to the following page in google area.
In above image you can see there are three sections 1,2 and 3.
Section 1
In this section you will have product information which you have selected from E- Commerce site.
Section 2
In this section if don't have google buyer account then you need to create it first then only you can move further with the process.
Section 3
In this section if you are existing user i;e, you are already having a buyer account on google then you can sign into this.