Related issues with browser caching

Questions about Browser caching
I learned the next HTTP header file knowledge and saw there was a website header file where Cache-controlno-store, No-cache, Must-revalidate, Post-check=0, pre-check=0.

Does this mean that each visit will be requested from the server? If this is the case, then you do not need to save the file to my IE cache directory, but the fact that the cache folder is still written into a lot of things, this is how it happened?
------Solution--------------------
The browser in order to quickly respond to the user's request (often cannot do, the play station response is not so fast) the client then creates a buffer to hold the page that the user has visited. So there's not much waiting for the user to visit again
Even so, the browser takes the policy of caching the page content to a file and then interpreting the page content from the cache file.
This reduces memory consumption (in any case, the unit price of the current memory is still much higher than the unit price of the hard drive)
Even if invited to write every time, it is also very cost-effective

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