Currently, as shown by the large size of the bitcoin mempool, the holding
area of unconfirmed transactions, the Bitcoin network is congested, leading to high transaction fees and longer transaction verification periods.
The integration
of the Bitcoin Core development team's
transaction malleability and scaling solution Segregated Witness (SegWit) has significantly reduced Blockchain congestion within the Bitcoin network, decreasing the size
of the Bitcoin mempool - the holding
area for
unconfirmed transactions - and the average Bitcoin block size.