Dogecoin has sponsored multiple high profile events such as Nascar teams and the winter olympics - even so there are few locations to use the coin - and instead it has become a de facto internet tipping currency.
The first indicator though that this may be coming to an end has just flashed.
You can mine Dogecoin either solo, or by joining a mining pool.
You can use this chart to understand various different things like how the has changed over course of time.