What is Mimblewimble in cryptocurrencies?

Mimblewimble (MW) is a scalable method for anonymizing transfers in the Bitcoin network, which became an independent blockchain. It is used in Grin and BEAM cryptocurrencies. MW does not have public addresses. To send a transaction, users exchange outputs directly, which makes it impossible for outsiders to analyze transfers from one address to another. A block in Mimblewimble does not look like a combination of several but like one big transaction. This means that blocks are checked and validated without providing details of each transaction.