I give out 2 STEEM if you help me... say what is STEEMIT

I get questions from outside this platform what is steemit, so i can't always explain it to everyone as easily as possible what is STEEMIT.
But I hope you here who use Steemit that you have some cool three sentences how to say it as easily as possible, so that it generates interest.

So text here below this post how you go say it,
and I try give out after the third day to one good description 2 STEEM.
Not make it very long, but make it memorable.