What is Segwit?

[Riberet19]

Bitcoin Segwit is a change in the structure of the blocks that allows more transactions to be stored per block and allows the integration of side chains, the blocks in the chain must meet certain certifications to be considered valid, such as a specific header, a count of transactions and the list of transactions all in one megabyte of storage, Segwit is compatible with previous nodes and blocks of the Bitcoin chain so there will be no compatibility problems, with the implementation of Segwit two objectives are met, one is the effective capacity to process transactions is increased and the continuity of the operation of all nodes is ensured without the need to update all nodes.