This phrase "the four P's" usually pertains to the marketing field, giving the fact I am a Marketing major. This can also apply to yourself in the growth field.
Product. Say you are the product and you are in the need of development. You have to be clear about who you really are and what you want. If you want your product to be received in the market, you must be able to describe it, define it, and articulate to others, those who will buy it, exactly what it is and what it can do.
Price. Once you know what or whom your product is, you must decide on the pricing. In self-development this is defined as self worth. It is understanding you don't have to settle for just anything that comes your way, no matter how rushed you feel.
Packaging. When you are in a loving, nurturing, and peaceful place within yourself; people and things alike follow suit. This is your personal packaging.
Promotion. Is knowing how you are going to reach those you want to attract. It's not so much of your result, but the response to who you are, how you feel, and what you are thinking.
The Four P's is a great way to elevate yourself in self development.