You should gather facts in an Ansible playbook when:
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Dynamic Decision Making: You need to make decisions based on the system's characteristics, such as OS type, version, or available disk space.
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Conditional Tasks: You want to run tasks conditionally based on the gathered facts (e.g., installing different packages based on the OS).
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Inventory Management: You need to collect information about the hosts for inventory management or reporting purposes.
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Debugging: You want to troubleshoot or debug issues by examining the system's configuration and state.
If none of these scenarios apply, and you want to speed up execution, you can set gather_facts to false.
