The page caching improves the {bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}sTTFB{bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}s (time to first byte) which measures the duration from the user or client making an HTTP request to the first byte of the page being received by the client's browser.