Monero (XMR) is a privacy-focused cryptocurrency that uses a blockchain with obfuscation techniques to achieve anonymity and fungibility. It employs stealth addresses, ring signatures, and RingCT to hide the sender, receiver, and transaction amounts by default, unlike transparent blockchains like Bitcoin. Monero is decentralized, untraceable, and resistant to ASIC mining, making it a popular choice for those desiring strong privacy protections in their digital transactions.