1. Go to Blogger Dashboard>>Settings>>Basic
2. Now go to Publishing>>Blog Address. Here below you will see a link “ +Set up a third-party URL for your blog “ .
3. Now here type the URL address of the domain you have recently purchased. .
4. Click on Save
5. After the above step you will see an error as shown an example on above screenshot. Don’t cut the page
Steps for Godaddy.com
1. Login to your Godaddy Account and Click on “ My Account “
2. Click on Manage my domain
3. Now select that domain which you want to modify.
4. Click on “ DNS Zone File ” Tab
5. Now Select “ Add Record “ option .
6. A popup box will appear, fill these details to use
select “ CNAME (Alisa ) “ Option
Host : www
Points to : ghs.google.com
TTL : 1 hour
Points to : ghs.google.com
TTL : 1 hour
Save it
7. After completing the above process now click “ Add another “ option
8. again appear this form
Select CNAME (Alisa )
See step 5 error put your unique code under www in host option and ghs.google.com point to option
Now are done.
Now go back to Blogger and try to save settings again. The registration process takes 24-48 hours, so don't worry if you get an error again. Come again later to Blogger after 24-48 hours, repeat steps Save and the error should be gone.