The document discusses the UK public sector's shift towards digital services and platforms to improve efficiency and lower costs. It advocates adopting open standards, open source software, and open data to build common digital services across the public sector. This allows organizations to reuse and share solutions while avoiding vendor lock-in. The Government Digital Service has led this transition, generating over £500 million in savings annually by developing transactional services digitally using open techniques. Adopting open source offers lower costs than proprietary software through shared development and maintenance.