Answer:
Brand Identity
Explanation:
Based on the information provided within the question the term being mentioned is called a Brand Identity. Like mentioned in the question this term refers to a visible, audible and sometimes physical element of a brand, which can be a color, design, logo, phrase, symbol or even a combination of all that sets a company apart from the rest of the market and identifies the company by that aspect alone. Which in this situation is what Ultra-Long is doing by creating it's ad and a catch phrase for it's product line.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.