What is also know as a visual aid in a presentation

To promote a product we need marketing. So marketing plays an important role, moreover, the demand process also is required.

Explanation:

Marketing for any specified product can be done by visual aid presentation. Visual Aid presentation should have a cached message to the audience and the importance of promoting's the product and it should impact the customer to purchase products and demand for availability should increase.

Once the demand for the product increased then sales and manufacture of the product are increased. So the growth of the company is increased. So, in other words, it is called chain management in the growth process.