Supported editions and Lightning Experience requirement
Key Takeaway
B2B Commerce works only in Lightning Experience, and only on Enterprise Edition, Unlimited Edition and Developer Edition.
B2B Commerce lets a company sell to other businesses through an online store built on Salesforce. Before a company can use it, the org must meet two requirements. The org must run a supported Salesforce edition. The store must also be set up and used in Lightning Experience. Separately, the company buys a Commerce edition, Commerce Growth or Commerce Advanced, which sets how many stores, licenses and bundled features it gets.
What the org needs
B2B Commerce is available only in Lightning Experience, not in Salesforce Classic. So you set up, manage and use B2B Commerce in Lightning Experience.
B2B Commerce is supported only on three Salesforce editions: Enterprise Edition, Unlimited Edition and Developer Edition. An org on any other edition, such as Professional Edition, can't use B2B Commerce until it upgrades to one of these three.
The two requirements apply together. A supported edition doesn't remove the need to work in Lightning Experience.
If your org runs Professional Edition or another edition outside the supported three...
Upgrade the org to Enterprise Edition, Unlimited Edition or Developer Edition before you use B2B Commerce.
If your admins or users work in Salesforce Classic...
Switch to Lightning Experience to set up and manage the store.
Amara is the admin for a medical supplies distributor. The org runs Enterprise Edition. Amara has always done her admin work in Salesforce Classic. Enterprise Edition supports B2B Commerce, so the org doesn't need an upgrade. Amara still has to switch to Lightning Experience, because B2B Commerce isn't available in Salesforce Classic. She sets up the store and manages it from Lightning Experience.