Dogecoin is a decentralized cryptocurrency launched in December 2013 by software engineers Billy Markus and Jackson Palmer. Originally conceived as a lighthearted parody of Bitcoin, it features the Shiba Inu dog from the 'Doge' meme as its logo. Dogecoin operates on a proof-of-work blockchain and is primarily used for tipping, donations, and microtransactions. Despite its origins as a joke, it has gained significant popularity, driven by community support and endorsements from public figures.