Description: A fast-forward is a type of merge in the Git version control system, where the pointer of the current branch moves forward to the target branch. This process occurs when the target branch has advanced without any changes being made to the current branch since they diverged. In other words, a fast-forward happens when there are no divergent commits in the current branch, allowing Git to simply move the pointer of the current branch to point to the same commit as the target branch. This technique is efficient and clean, as it avoids creating an additional merge commit, keeping the history of changes more linear and easier to follow. Fast-forwards are particularly useful in workflows where a clear and concise history is desired, such as in projects with frequent reviews and continuous integration of changes. However, it is important to note that fast-forwards are only possible under certain conditions, requiring good branch management and a clear understanding of how merges work in version control systems.