According to Wiktionary, a sales pitch is made of remarks or demonstrations intended to persuade a consumer to make a purchase, especially when vigorously delivered or exaggerated. For this exercise you are to deliver a sales pitch of at least 30 seconds for a new product or service. Remember that a new product should be a solution to a specific problem or fulfill a specific need—Perhaps one that you have created.. So make sure to focus on that.
For inspiration you can listen to:
Rory Sutherland: Life lessons from an ad man | PART 1
The twelve most powerful words in English
Elements of a Good Sales Pitch
Keys to Successfully Pitching Your Product
Message Map: How To Pitch Anything In 15 Seconds
The Wolf of Wall Street Jordan Belfort Teaches You How to Earn Millions of Dollars!
and don't forget the ten most powerful words in advertising here . . . and here