If you are asked: "So, what are you doing?" it is often quite hard to come up with a swift and clear answer for what your company actually sells. Many have a tendency of maundering, deepening or understating leaving the questioner with a diffuse impression of what has been said.

You got 15 seconds
Try to prepare the perfect sales presentation brief enough to be told to a stranger in an elevator going up five floors. He or she might be a potential customer.

A restaurant owner and an IT expert could work out the below sales presentation:

• Sales presentation from the restaurant owner
  I own the city’s most entertaining Sports Café with a capacity of 150 people. It is fully equipped with state-of-the-art technology providing full insight into all aspects of the world of sports from separate monitors at each of the 40 tables.
  We have specially trained staff to serve our menus and drinks at fair prices. Here is my business card, it is a one-meal-free voucher for you and a friend.

• Sales presentation from the IT expert
  We provide a service for companies enabling their existing financial management software to handle electronic invoicing, stock control and payments transfer. This is a requirement large companies will shortly ask their suppliers to meet.
  Furthermore, e-commerce is cutting administrative costs. Those joining now will be ready to face the future.
  - Source: How to Start Business | Business Plan