If you are blogging on blogspot and wanted to use a custom domain, say myblog.com, Blogger has this feature allowing you to still host your blog but use a custom domain that you choose.
Assuming that you registered your domain to other registrars, in my case at namecheap.
How to Use A Custom Domain on Your Blogspot Blog
1. Register your domain, in my example, I’m going to show you how to do it on Namecheap.com, since I registered all my domains on the said site.
2. Since Blogger requires you to create a CNAME and point it to ghs.google.com we are going to modify the URL forwarding functionality.
3. Just log in to your account and choose the domain you wish to use. No need to modify your DNS settings. Just click the URL Forwarding link at your side bar.
4. Enter ghs.google.com for the CNAME alias, just like the illustration below.
5. Just wait for the changes to propagate.
