In Priceshape a match is defined as a vendor's product which is the same as yours.
Priceshape searches and finds your vendors' products on Google Shopping, if the system finds a product that matches yours based on the GTIN it is added next to your products in the product list, which will be a match.
Manual match
A manual match is a vendor product URL you added manually into your feed in your account, for example, if you have a vendor product URL that is not found on Google Shopping, you can add it as a match. Because it is added manually it is called a manual match.