Answer:
encoding.
Step-by-step explanation:
The communication process used by the HP advertising agency is encoding. It occurs when the agency decides to turn some abstract idea using symbols, images, words, and sounds into a communicable and intended message.
Encoding assists in marketing and promoting a product in the form of advertisements, sales promotions and announcements, with the message and idea that the company wants to convey about the product, highlighting its positive characteristics and benefits.