Diff

"Diff" is short for "difference" and typically refers to comparing two versions of a file or document to identify what has changed. It highlights additions, deletions, or modifications made between the two versions, making it easier to see exactly what is different. This process is commonly used in software development, writing, and editing to track changes, review updates, or collaborate effectively. By showing only the differences rather than the entire content, "diff" helps users quickly understand what has been altered without reviewing the entire document.