What is the purpose of the 'Cache-Control' header in HTTP?

What is the purpose of the 'Cache-Control' header in HTTP?

Step 1: Understand that HTTP is a protocol used for transferring data on the web.
Step 2: Know that when a web page is requested, the server sends a response back to the client (like a web browser).
Step 3: The 'Cache-Control' header is part of this response.
Step 4: This header tells the client and any intermediaries (like proxy servers) how to handle caching of the response.
Step 5: Caching means storing a copy of the response so it can be used again without needing to request it from the server.
Step 6: The 'Cache-Control' header can specify rules like how long to keep the cached response or whether to revalidate it with the server.
Step 7: By using this header, the server can improve performance and reduce load by controlling how data is cached.

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