For a lot of people, the scope of marketing is limited to the direct sales aspect of their profession. However, marketing is the umbrella term for everything that goes in between and beyond that. Marketing includes everything from the product to the people who make the product, to the customer to the brand, to the services to the advertising and all the things that come with it.
Marketing is a broad term and it can mean anything and everything. But marketing in the broadest sense of the term encompasses everything from what you are selling, to the people who are buying it, to the services you provide, to the products you offer, to the customer service you provide, and it also includes the salespeople and the sales channels that you use.