I have seen many video about people saying to buy a SSD because if you do you can boot up stuff quicker. I do not understand what that means so If someone could explain what they do and why is it good. Also I might be asking a stupid question but I don't get how you use both. the Hard Drive and the SSD at the same time. Cause you install it both but when you download stuff which does it go to. do you assign where it goes when you download it or what. If I need one please explain why and what it is used for thanks. 
Specs Are
Fell free to give advise
http://pcpartpicker.com/p/Bz777P

Specs Are
Fell free to give advise
http://pcpartpicker.com/p/Bz777P