Administration Email is used for receiving emails and updates.
You must change it:
- When transferring the ownership of your website.
 - If you want to change the primary email address of your website.
 
To change yourAdministration Email Address:
- Login to WP Admin.
 - Go to Settings > General.

 - In the text box, change the Administration Email Address.
 - Verify the new email. The site will automatically update after verification.
 
                    Note
                    
            Check the junk folder of your email if you have not received the verification email.