macOS and applications hide files to reduce clutter or protect managed structure. Common examples include configuration, metadata, indexes, and service state.
A hidden file can be essential even when it is small, old, or unfamiliar.
Use its path, owner, name, and associated application to understand it. Preserve hidden items inside projects, Home configuration, packages, and managed libraries unless you know their role.
Do not enable Finder’s hidden-file view and perform broad deletion based only on appearance.
Use a supported focused cleanup category when one applies; otherwise leave the item in place.