Custom URLs for LWR versus Aura stores
Key Takeaway
For an LWR store, Salesforce recommends a custom URL on a custom domain served by the Salesforce CDN (Cloudflare) before you go live, because the default URL is meant for testing. For an Aura store, a custom URL is optional.
Every B2B Commerce store starts with a default URL on your org's Salesforce domain for digital experiences. A custom URL replaces it with your own branded domain plus a path, served through the Salesforce content delivery network (CDN) with Cloudflare as the CDN partner. The store template decides how much a custom URL matters. Salesforce recommends one for LWR stores before they go live, but it's optional for Aura stores.
Default URL and custom URL
Every B2B Commerce store starts with a default URL. The default URL is the URL string you enter when you create the store, added to your org's Salesforce domain for digital experiences.
The default URL includes a temporary path. The default URL is meant for testing pre-production stores during development.
A custom URL is your custom domain name plus a path. A custom URL replaces the default URL with your own branded domain, served through the Salesforce CDN with Cloudflare as the CDN partner.
An admin creates a B2B store and enters "parts" as the URL string. The org's Salesforce domain for digital experiences is NorthwindTools.my.site.com, so the default URL is NorthwindTools.my.site.com/parts. Later, the company sets up the custom domain shop.northwindtools.com and picks the path "industrial". The store's custom URL becomes shop.northwindtools.com/industrial.
The domain also changes how large an uploaded file can be. On the system-managed .my.site.com URL, each file can be up to 128MB. On a custom domain, each file can be up to 500MB.