Git blame shows line-by-line authorship information for files, helping track down when and who made specific changes for debugging and code review. As the creator of CoreUI with over 25 years of development experience, I use git blame regularly to understand code history and track down the source of bugs or features. The most straightforward approach is using git blame filename to see author, commit hash, and timestamp for every line in a file. This command is invaluable for collaborative development and understanding code evolution over time.