Barclays plc operates as a multinational bank providing a wide range of financial services. Its activities include retail banking for individuals and small businesses, as well as corporate and investment banking services for larger enterprises and institutions. The bank generates revenue through interest income, fees, and commissions across its various segments, which include personal banking, corporate banking, investment banking, and wealth management. Barclays serves customers in the UK and internationally, with a focus on both consumer and corporate markets.