It's the application of the titular "doge meme" to a message expressing grief. The history behind it is the history of the doge meme itself: https://en.wikiped

It's the application of the titular "doge meme" to a message expressing grief. The history behind it is the history of the doge meme itself: https://en.wikipedia.org/wiki/Doge_(meme) https://en.wikipedia.org/wiki/Doge_(meme) The reply comment "wow" is also part of the doge meme, and the two comments together form another kind of a meta-meme, where one person writes an unfinished, but straightforward reference to something, and the reply commenter completes that - a traditional "call and response", also very popular in songs. https://en.wikipedia.org/wiki/Call_and_response https://en.wikipedia.org/wiki/Call_and_response