The best registrar for existing Shopify users (costs start at $14 per month).

Shopify offers a domain name registration tool and automates the entire domain setup and registration process. It provides more than 50 domain zones, including top-level domains, regular domain names and national top-level domains. You can use national TLDs to specifically target your audience from a certain country or region and improve your search engine ranking there.

Shopify includes a domain name generation tool that suggests variations of a keyword or company name when you type them in. Or you can favor the most popular domain names. Each offered domain name option has a price per year.

Plus, it allows you to manage subdomains and email redirects, remove domains from your store, and transfer your existing domains to Shopify. In addition, all of the domains available in Shopify are offered along with privacy protection in the WHOIS database, which keeps your personal information safe.

In addition, you can use Shopify’s website builder to create your website or blog and then register a new domain right away. The website builder includes drag-and-drop functionality and 70 themes created by professionals.
Benefits:

The capacity of your Shopify store and the number of products you can sell in it is unlimited.
Over 100 international payment systems.
Search engine optimized.
Options for individual domain names.
The main domain can have many subdomains.

Cost:

Cost varies for each domain name and zone.