So, server load time or first byte will declare your site user friendly or not. As mentioned by Google ,,200ms,, if my math is not wrong then Google wants our webpage’s server should give first response on readers browsers within 2 seconds .,…..
(Got it? lot of times this factor will outrank others.,,so use CDNs, recommended plugins only,https, schemamarkup theme,fast server,,,,,
You can use the free tools to check the speed matrices like
It is also important to note that all these three tools will show results with bit variance so dont worry on it rather accept all the results to make a refined decision.
If you are checking on pingdom then 2 sec would be last score and if you are on webpage speed then 3 sec can be acceptable however
Optimal server load time or first byte that a user’s browser can receive should be under 2 seconds or 200 ms. Try to get that if you want your page come on top 10 results of Google.