An SSD is a Solid State Drive, i.e., a drive with no moving parts. It is made of the same material as in the memory chips in your computer. An SSD is much faster than the regular hard drive in your computer, more reliable than the hard drive in your computer and very expensive. In general, the only significant improvement in system performance with an SSD is that your computer will boot up MUCH faster (Turn on). That's a lot of money to pay just to have a computer that turns on very quickly, but if money is no problem, then go for it, otherwise, just stay with what you have. If your games make very frequent read and writes to your hard drive, then you will gain some improvement there, too. But the games load up into your computer memory anyway, which is the same thing as having an SSD unless you have a very small amount of memory in your computer.