You gain access to the Chase Ultimate Rewards program by being a card member of certain Chase credit cards such as the Chase Sapphire Preferred card, Chase Sapphire Reserve card, Chase Freedom, Chase Freedom Unlimited and the Chase Ink Business Preferred card. In the program, you can EARN Chase Ultimate Rewards points. You can then USE these Ultimate Rewards points for free travel. If you have more than one card (including a Sapphire) that earns Ultimate Rewards points, you can even combine your points into your Sapphire card account and redeem at a higher redemption rate.
Read about how to earn and accumulate Chase Ultimate Rewards points here
Read about how to use Chase Ultimate Rewards points here
Read about sharing and transferring Chase Ultimate Rewards points
Read About Chase Ultimate Rewards expiration Information
Read about what happens to your Chase Ultimate Rewards upon death