When notified that your new BT website is ready to go live, you'll need to update some settings where your domain is hosted. This process is called Smart Hosting.
It’s easy to make changes to your domain name. To do this, contact the company that currently hosts your domain name and ask them to update your DNS A record to 18.104.22.168. You'll also want to change the records to allow users to find your website without entering ‘www’. These changes will point your domain to your new BT Website and take up to 24 hours to take effect.