In some cases, you may want a product to always appear as “always in stock” regardless of whether the product has inventory. For instance, if the product is normally dropshipped or is a special order product. Channels allows you to control product availability using the third Keyword field on the Web tab of the Product Card in Lightspeed Onsite.
NOTE: When Update Visibility is On in Channels Settings, the product can be returned to its regular Inventory setting by removing the keyword from the third Keyword field and clicking Save on the product card.
Shopify - "In Stock"
By placing the words “In Stock” or "instock" in the third Keyword field, Channels checks the box on the Variant in Shopify to “Allow customer to purchase this product when it's out of stock”. This ensures that shopper can order the product in Shopify at all times.
Magento - "In Stock"
By placing the words “In Stock” or "instock" in the third Keyword field, Channels sets the Manage Stock setting of the product in Magento to “No”. This ensures that the product appears as “In Stock” at all times in Magento.