1. Basically, in short terms, when a pun/joke is so bad/good, that people feel the need to give the sender an internet.
2. When something is so incredible that you beat the
ultimate game,
the internet, the reward being the respect/hate of several strangers that you don't know, and of course, the internet.
3. Something someone might say if they see
something stupid, amazing, Etc. Mostly in amazement.