Dogecoin (doʊʒkɔɪn DOHZH-koyn, code: DOGE, symbol: Ð and D) is a cryptocurrency featuring a likeness of the Shiba Inu dog from the "Doge" Internet meme as its logo. Introduced as a "joke currency" on December 8th 2013, Dogecoin quickly developed its own online community and reached a capitalization of US $60 million in January 2014; as of June 2017, it has a capitalization of US $340 million.

Compared with other cryptocurrencies, Dogecoin had a fast initial coin production schedule: 100 billion coins have been in circulation by mid 2015 with an additional 5.256 billion coins every year thereafter. As of June 30th 2015, the 100 billionth Dogecoin has been mined. While there are few mainstream commercial applications, the currency has gained traction as an Internet tipping system, in which social media users grant Dogecoin tips to other users for providing interesting or noteworthy content. Many members of the Dogecoin community, as well as members of other cryptocurrency communities, use the phrase "To the moon!" to describe the overall sentiment of the coin's rising value. Thanks to crowdfunding efforts, a gold coin representing the cryptocurrency is scheduled to reach the Moon's surface in 2019.

Dogecoin faucets are a reward system, in the form of a website or app, that dispenses rewards in the form of a dogetoshi, which is a hundredth of a millionth DOGE, for visitors to claim in exchange for completing a captcha or task as described by the website. There are also faucets that dispense alternative cryptocurrencies. Rewards are dispensed at various predetermined intervals of time. Faucets usually give fractions of a dogecoin, but the amount will typically fluctuate according to the value of dogecoin.

Faucets are a great way to help introduce new people to dogecoin, or to your favourite altcoin. Many faucets provide information to newbies as well as offering them some free coins so that they can try before they buy, experimenting with a test transaction or two before putting real money on the line. Since this whole area is so new and a bit scary to some people, who perhaps don't quite trust it with their hard earned cash yet, this is a great way to promote digital currency and bring in new users.