Marketing , what does it mean ? 01. Introducing product or 02. Increasing sales ???

Marketing is generating the demand through getting understanding and anticipating customer needs 

Marketing is introducing product and increasing sales. It's both.

Marketing is basically communication with a very specific objective ... getting the receiver of the communication to purchase or acquire a specific product or service. 

Part of marketing is introducing a product, yes.  The most important though, is convincing the customer of the need for the product/service and thereby converting into a sale.

So yes, increasing sales could be a function of marketing.

Marketing mean presentation of company and it product in front of buyer in quiet attractive way. Marketing also mean customer convening power and to create interest of buyer in our products