Sorry to be so dumb but what does that mean
and how did you find that info?
DDOS = Distributed Denial Of Service
Hackers take stealthy control of thousands of computers across the Internet and from all over the world. They sit and quietly wait instructions from their zombie/hacker masters.
Then, all at once, they are directed at some site to crash it.
It is hard to trace since it comes from thousands or millions of computers are once and from all over the world.
The owners of those computers are unaware that their machines have been used in this attack.
Imagine if you were an evil attacker and you could get millions of computers infected with your special virus - a virus that puts you in control. Then you make the virus find the largest images on her site and each computer will download it and delete it again and again overloading her server. Or they can ping her with a long ping or multiple pings that will crash her server... or any million other ways.