Smart Defrag is a disk defragmentation tool that optimizes the performance of hard drives and SSDs by organizing fragmented files and folders. It offers multiple defragmentation modes, including boot-time defrag, automatic defrag, and manual defrag. The software also includes a Game Optimize feature that improves gaming performance by prioritizing game files and stopping unnecessary processes. Additionally, Smart Defrag supports multi-language and is easy to use with a simple and intuitive interface.