Database clustering is like having a team of expert chefs working together in a restaurant kitchen to ensure that every dish is prepared quickly and perfectly. In the world of databases, it's a technique where multiple database servers collaborate as a team. They work together to handle data requests, making sure that websites and applications run smoothly and without interruption. It's a bit like having backup chefs ready to step in if the main chef needs assistance. Database clustering improves performance, availability, and reliability by distributing the workload and ensuring that data is always accessible, even if one server faces issues. It's like the secret behind a restaurant's ability to serve delicious meals consistently.