How do you use fixer spray?

Excuse me, but I'm curious about how one might go about using fixer spray. I understand it's used in photography to stabilize images, but could you walk me through the process? Specifically, do you apply it directly to the photograph after development, or is there a certain sequence of steps I should follow? Also, what are some of the key benefits of using fixer spray, and are there any potential drawbacks or precautions I should be aware of? I'd really appreciate your insights on this topic.