If you use your computer on a daily basis, you may not realize that it is getting slower by the day. The computer registry gets cluttered with useless registry keys and it just is not smart enough to get rid of the clutter on its own. The computer hard drive also gets cluttered with useless files that can and will slow your PC to a crawl if not properly optimized on a daily basis.
System optimization requires reducing running processes in computer, changing work mode, deleting unnecessary break off for more efficient computer performance, optimizing file location for faster data write & read, freeing more system resources for computer use and reducing unnecessary system boot processes, etc. This will increase the stability and speed of computers, no harm to hardware.