A provisional patent (Provisional Application) is an interim patent that can be filed for utility inventions (see below). You can file a provisional patent without any formal oath or declaration or claims and don’t need information disclosure (prior art) statement.
A provisional Patent is a low cost alternative or preliminary step before filing for a non-provisional patent. The reason people do this is to test the market before spending too much money on a regular patent.
The provisional patent lasts for 12 months which should be long enough for you to manufacture your product and try and get sales.
Once you prove that the product is going to be successful or wish to further the patent lifespan you can then register for a non-provisional patent.
A utility Patent falls into the Mechanical, Electrical and Chemical categories. Utility patents can be granted to anyone who invents a new and useful process, device, machine, manufactured item or a chemical compound or a new and useful improvement to the same.