Parts are used to construct appliances. Each appliance requires a certain set of parts to build after purchasing, once the appliance is fully built you will gain access to the recipes on the appliance.
Here's a link to the Game Guide that explains in detail how building appliances works:https://forums.storm8.com/showthread...pliance-How-To
I'd recommend looking through the entire Guide as it's a great starting point for those new to the game. Happy gaming!