I am using Fiddler for the 1st time and hence my questions would be very basic, thank you for understanding.
I am trying to understand why a website is slow.
Under the statistics tab I found the below:-
In one response - TCP/IP Connect: is 20 seconds & ServerDoneResponse is 35 seconds
In 2nd response - TCP/IP Connect: is only 23 ms & but ServerDoneResponse is 29 seconds
What is the significance of TCP/IP connect
Is the ServerDoneresponse time taken by server to respond after receiving a request.
Example Response 1
The first thing to clarify is that you are using the old Fiddler while the forum is related to the new cross-platform Fiddler Everywhere.
That said, timings for TCP/IP Connect in the range of 21000+ms (21+ seconds) are most likely indicating that Fiddler could not make a successful connection to the server (see more here).