Git Detached HEAD Explainer

Git says you are in detached HEAD state and you have no idea if you just broke something. Give your commit hash and main branch name. You get a plain-English explanation of what detached HEAD actually is, whether anything is damaged, and the exact options for getting back to a normal branch without losing work.

Git is telling me I'm in detached HEAD state. Explain in plain English what this actually means, whether I've broken anything, and what my options are for getting back to a normal state safely. I am currently at commit {COMMIT_HASH} and my main branch is {BRANCH_NAME}.