Initially, many people thought Uber was a crazy idea, but it quickly gained traction and proved to be successful.

The original idea for Uber came from wanting to push a button and get a classy ride, inspired by the difficulty of hailing cabs in cities like Paris and San Francisco.

As young founders, our naivety allowed us to explore ideas without preconceived notions, leading us to discover the unique experience that Airbnb could offer. When we started Airbnb, we were in a very different position compared to Uber; the founders of Uber were already wealthy, while we were just trying to survive.

Uber is an app on your iPhone that helps you get a car, with the motto 'everyone's private driver.' You can see nearby cars and get notified when your driver arrives.

During my seven years at Uber, we expanded to 70 countries, completed 5 billion rider trips, and achieved a $70 billion valuation.

When people have the option to choose a more affordable ride, they tend to use the service more frequently, starting with options like Uber X instead of premium services.

Connecting people with cars to those who need rides is a fundamental idea behind many successful startups.

The product itself can serve as an educational tool for users, as seen with Uber, where the experience of using the app naturally educated new users.

Airbnb's growth was driven by the viral nature of unique guest experiences, which people naturally share with friends.