Google Product Search is a shopping search engine that specifically deals with products for sale, rather than services or information.

Google Product Search shows photographs of products related to the search query. The search results appear in a shopping box that is integrated into the regular result page and shows “Sponsored” disclaimer. Users can also restrict and modify their searches by:

Price
Types of Goods

Retailer

Along with the photographs the search query results also include product descriptions and a link with the seller’s name. If available, it may also include the seller’s rating provided by other Product Search users.

If you have something to sell then Google Product Search may be the shop window for you. You can upload your products for free, and you will be reaching a significant position.
Google Product Search works in the same way as Google does, in that relevance achieves the highest positions.

The only difference with Google Product Search is that it is only interested in actual products, not services. Listing your products on Google Product Search will give you many benefits like:

More coverage

Greater opportunities to sell

A product only portal on which to advertise

If you are selling products, and then you need to have them listed on Google Product Search. This way you can be found on either Google or Google Product Search.

Google Product Search will search the web for products as Google does, so ensure your products are not already listed before you try to add them.