An auto-edit is an edit that does not go through the normal voting process, but is instead automatically approved and instantly applied. All auto-edits are marked as such using an "(auto-edit)" notice. In general, only edits that add data to the database, not change or remove data, are eligible to be entered as an auto-edit.
Given a default data quality level, edits that add track lengths, change capitalization, or add certain types of missing release information are all examples of edits that are automatically approved as auto-edits.
Auto-editors are a trusted group of users who have been given "auto-editor" privileges, and as such the majority of their edits are entered as auto-edits. See the edit type documentation for more information.