Review the Add Products article for instructions on adding new products to share within communities of which you are a part.
If products have been added and shared with a community already, but now need to be shared with another community, there are two ways to share.
1. Share Product(s) from the Product list view
2. Share Product(s) from the Product detail page
Select the community to share your product with and select the appropriate product type from the options in the drop down menu, then click Next.
There may be additional fields to complete within the product record for the new community with which it is shared. Click Save & Share to save the product record.