Reducing TTFB

https://blog.cloudflare.com/ttfb-time-to-first-byte-considered-meaningles/

...but my TTFB is 10.8 seconds. I really want to reduce it.

Thats waaaaayy beyond being a ttfb consideration

thats a fault in your application or design.

What are you doing on the page?

i have got 5s TTFB...what you think i should do to reduce that?what are the possible ways that i should check

First check whether it's an application or server issue.

You need a test page. This should be the simplest possible page -- no Laravel, just HTML:

<h1>Test page</h1>

If the test page is slow, it's a server issue. If not, it's an application issue.