Dogecoin was created on December 6, 2013 as a "joke". Its purpose was to make fun of other cryptocurrencies, which at the time were rather frowned upon. But things did not go exactly as planned for its creator Billy Markus. A month later, a large community had formed around this currency and its capitalization already reached $ 60 million.
This crypto-active has as logo the famous Japanese dog breed Shiba Inu, which is at the origin of the internet meme of a dog named "Doge". This meme consists in using the image of this dog by lending it sentences in English that are really short and not necessarily written in academic English. This meme was therefore chosen to refer to the famous "When moon?" or "When lambo?" that a lot of crypto investors like to use.
As you can see, the original purpose of Dogecoin was really to have a good laugh with friends.
However, even if the DOGE does not really have an economic interest, it is possible to use it mainly as a means of payment to give tips to creators of content on the internet, for example through the sodogetipbot on Reddit.