What is Marketing?

I have 12 years professional career in sales & marketing. So, I have practical experience in marketing. Basis on that I am describing the definition of marketing. It will be different from bookish language.

Marketing is the process from the production of a final good to reach the final customer. How many steps are involving from product producer to final customer and sum of all steps are called marketing. Steps are producer, company, distribution, package, brand, promotion, retailer etc.  Someone says idea or concept develop is marketing. It is a wrong concept. If you don’t make final product or service then how come marketing. So, marketing is start when finished goods and services produce.