A PCB Prototype is an implementation of your PCB Design output from your PCB Design software. PCB Prototyping involves a number of specific important steps. The first step is to do a PCB Design which is acceptable by the target PCB Prototyping factory. This can be achieved by checking with the factory info about their capability and their capacity as you design. This is information to do with the PCB Prototyping factory preferred method of design and limits involved such as pad dimensions and pad-to-pad separation distance, trace size and trace-to-trace separation distance, minimum and maximum PCB area, maximum PCB layers and also the preferred Panelizing method.
PCB Prototyping in a factory not only involves production of a bare PCB, it may also include PCBA depending on what you want the PCB factory to do for you. This is why you should choose a PCB factory that will produce your PCB Prototype just the way you want it done. One like wellpcb will do PCB, PCBA and more.
To get your PCB Prototype(s), do all your PCB Design and have all your files ready to submit to the PCB Prototyping factory. Fortunately, today there are many PCB Factories which have specialized in making PCB Prototypes for anyone for any volume ordered. A great example of such a PCB Prototype factory is wellpcb.com. To make a PCB Prototype, they accept your PCB Design files and provide you with information regarding how much it will cost you to manufacture your PCB Prototype and get it shipped to your preferred destination. The process followed ensures that you get a quality PCB Prototype.
After you have made payment, you just sit back and wait for your PCB Prototype at your post office. The package is shipped after they have been tested to work as you described in your PCB Design. It is worth noting that you can make your DIY PCB Prototypes at home but in long run, it would be much more productive of you if you let experts and their machines do what they are good at while you do what you are good at.