What is Block, Jack Dorsey's firm that laid off 4,000 people due to AI?

Block recently announced 4,000 job cuts, around 40% of its workforce, due to its shift towards AI. The US-based fintech company, co-founded by Jack Dorsey, the former CEO of Twitter, has a market capitalisation of over $33 billion. It provides digital payment solutions, including Square for merchant payments, Cash App for peer-to-peer money transfers, and TIDAL for music streaming.