Buggy drivers are a major cause of crashes, performance issues and many other PC problems, so it's a very good idea to keep yours up-to-date. You could do this manually, but who has the time to browse endless hardware websites, looking for upgrades? Fortunately that really isn't necessary, because Driver Magician will quickly do all the hard work for you.
When you first launch the program it will scan your PC, checking for installed drivers. Once the process is finished, click Update and it'll compare your driver versions with an online database, then let you know which ones have updates available.
In theory you can then just click a Download button to grab whatever might be available. In practice, though, the trial version will only show you updates: you can't download them until you've purchased a program licence.
Note that this is the Lite and free version of Driver Magician. Features are very basic - allowing you to backup your drivers only. No driver restoration, updates or additional functionality.