Caching is a technique that stores frequently accessed data in a fast-access storage layer (cache) to reduce the time needed to retrieve that data from slower storage systems. It acts as a temporary storage between the application and the data source.
Key benefits:
Performance improvement: Reduces latency by serving data from faster storage
Reduced load: Decreases burden on databases and external services
Cost efficiency: Reduces expensive database queries and API calls
Better user experience: Faster response times improve application responsiveness
Example: Instead of querying a database every time for user profile data, cache it in memory for quick access.
Rewriting in plainer words…
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