When enabled, this feature will display a component in your checkout UI making it easy for the user to copy the contents of the current cart and via a link share it externally.
Share Cart Component Pn
The link generated will contain the ID of the current cart/new?cartId={{cartId}} and upon accessing this in a new browser/session the cart will be loaded.

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Configuration

The Share Cart feature is a prop configured in a version
Share Cart Props Pn
In order for it to work properly the Prop Name must be shareCart and the Prop Value as a JSON 
{
  "enabled": true //boolean
}
When set as true the share cart component will be always visible, for all users

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Share Cart exclusive for specific type of users

It is often the case where you might want to allow the share cart to be visible in specific conditions, for example when someone from your Support team is helping out a customer, or if you are a B2B business and the shopper is buying on behalf of someone else. For situations such as these you can configure the Share Cart to be visible according to a role . 
{
	"role": "telesales" //string
}
Specifies the user role required to access or use the share cart feature.
If you are using VTEX as your Commerce provider, this should match the customerClass.