From the Hyatt web site:Member Benefits

What's also exciting is that World of Hyatt members can enjoy many of the rewards and benefits of membership when completing a qualifying stay booked through Hyatt. (Not a member yet? Join World of Hyatt in just a few clicks.)
5 Base Points per every eligible $1 USD spent on room rates

4 Bonus Points per every $1 USD on room rates for World of Hyatt Credit Cardmembers when paying with the card. Learn more

Standard tier Bonus Points on eligible room rates for elite tier members

Credit toward earning tier status and Milestone Rewards

Use your earned points for free nights at Hyatt hotels and participating Mr & Mrs Smith hotels

Room upgrades for Globalists upon check-in (based on availability)

Credit toward a Brand Explorer Award—earn a free night for every five unique Hyatt brands experienced, including Mr & Mrs Smith

To learn more about how Mr & Mrs Smith hotels participate in World of Hyatt, please see the program terms.