What is Dogecoin?

What is Dogecoin?
What do you mean by "decentralised"?
What do you mean by "cryptocurrency"?
Okay, but what does that mean?
So who does run Dogecoin?
I sent my Dogecoin to the wrong address, or I sent Dogecoin to a correct address, expecting goods or a payment in return, and have not received anything back - can you help in either case?
Can you reset my two factor authentication?
I lost my wallet/private key, what do I do now?
How do I use/accept Dogecoin?
Would you like to hear my business idea?
We are an open source project, not a business - so no, thank you.

Would you like paid advertising?
Who do I talk to about listing Dogecoin?
I sent coins to the giveaway, why hasn't anything come back?
Why has my trade not gone through?
How do I back up my wallet?