How caching works in Next.js

Next.js uses four caching systems to optimize performance: Request Memoization, Data Cache, Full Route Cache, and Router Cache. Request Memoization prevents duplicate data fetches during rendering. Data Cache stores fetched results on the server for reuse across requests, with configurable revalidation. Full Route Cache saves entire pre-rendered pages for quick loading, while Router Cache allows fast navigation between visited pages during a session. These caches work together to create a comprehensive caching strategy, enhancing speed and efficiency.