Difference between Groups and Branches

Groups - Allows only one option to be selected. 

You can identify a Group in the form layout by the following icon:

Branches - Allow multiple items to be selected that are nested beneath it. 

You can identify a Branch in the form layout by the following icon:

How to Use a Group:

Use groups to enforce a choice between options.

Chose one of the following and other options will disappear once chosen.

For example, limit one entry choice per driver.

How to Use a Branch:

Use branches to select an amount in any combination of the following.

For example, you can chose multiple sizes of multiple different t-shirts.

Video Example of building an event, utilizing Groups and Branches: