Caching stores frequently accessed data in memory, reducing the need for repetitive database queries. This significantly speeds up response times and decreases server load.

Caching is a powerful technique used to enhance the performance of web applications by storing frequently accessed data in memory, thereby reducing the need for repetitive database queries and computations. When a user requests data that has been cached, the application can retrieve it quickly from memory instead of querying the database, which is typically much slower. This leads to significantly faster response times and reduces the load on the database server, allowing it to handle more concurrent requests efficiently. There are various caching strategies that developers can implement, including in-memory caching solutions like Redis or Memcached, which provide fast access to cached data. Additionally, Django and Flask offer built-in support for caching, making it easy to integrate into applications. Caching can also be applied at different levels, such as page caching (storing rendered HTML), object caching (storing database query results), or fragment caching (caching specific parts of a page). By effectively utilizing caching, developers can greatly improve user experience, optimize resource usage, and scale applications to accommodate larger traffic volumes.