Existing products become available to that channel by default unless adjusted manually.

Yes, additional sales channels can be installed through the Shopify App Store.

The Online Store sales channel is included by default.

They appear in the Sales Channels section of Shopify Admin.

Yes, Shopify allows merchants to manage multiple sales channels from a single dashboard.

They help merchants reach customers across multiple platforms and increase sales opportunities.

Shopify online sales channels are platforms and marketplaces where merchants can sell products while managing inventory, orders, and customers through Shopify Admin.