JN0-221 Exam - Question 32

The 'register' key in Ansible is used to capture the output of a task into a variable. This variable can then be used later in the playbook to examine the results of the task, make decisions, or pass the data to other tasks. In the provided playbook, the 'register' key is used to define the variable 'out' that will contain the return value from the 'juniper_junos_config' module.