SUPPORTING OR AUXILIARY FUNCTION MEAN SUCH ACTIVITIES WHICH ARE NOT DIRECTLY RELATED WITH THE PRODUCTION OF GOODS AND SERVICES AS ALSO WITH THE THE TRANSFER AND EXCHANGE OF GOODS AND SERVICES . BUT THE IMPORTANCE OF SUCH AUXILIARY FUNCTION ARE IMMENCE  AND THOSE ARE VARIOUS NATURE AND KINDS.

1. FINANCING : THE NEED FOR FINANCE IS FOR VARIOUS PURPOSE AS FOR INSTANCE  PROCUREMENT OF RAW MATERIALS  SPARE PARTS AND EQUIPMENT WAGES FOR FACTORY LABOURERS FOR PRODUCTION AND ADVERTISEMENT AND OTHER EXPENSES FOR MARKETING OF PRODUCTS.
2. RISK BEARING : RISK IS INHERIT IN MARKETING FUNCTION . THE MARKETING FUNCTION IS REQUIREMENT TO HAVE THE CAPACITY TO WITHSTAND RISK BY GUARDING AGAINST UNFORESEEN EVENTS .
3. MARKET RESEARCH:  IN THE PRESENT DAY COMPETITIVE AND DYNAMIC MARKET RESEARCH HAS TAKEN A BIGGER DIMENSION TO KNOW ABOUT THE COMPETITORS PRODUCTS AND THE LIKES AND DISLIKES OF THE CONSUMERS.
4. ADVERTISEMENT: ADVERTISING IS A PUBLICITY PROCESS WHICH CREATES AWARENESS OF THE PRODUCTS RESULTING IN DEMAND FOR THE  PRODUCTS . AS A RESULTS SALES INCREASES AND PROFITABILITY GOES UP.
5. AFTER SALE SERVICE: THE MARKETING FUNCTION INCLUDES POST SALE SERVICE AND AFTER SALES SERVICE TO THE CUSTOMERS . GENERALLY AFTER SALE SERVICES ARE  PROVIDED   IN CASE OF DURABLE GOODS FOR A CERTAIN PERIOD OF TIME , SAY FOR ONE YEAR AND SO ON.