What represent rountrip latency in milliseconds?

It's the time a small packet is sent from your server, to the remote server, who responds back. When that response is received, you have the Latency in ms (calculated time of sending and receiving the response).
Overall, the higher the latency, usually the slower the connection (but not always).

Well mine are 200ms and seems faster after i used TCPOptimizer

About latency someone told me: That`s how long it took to ping whatever address you pinged

Kimputer do u know how to give more bandwith for a .exe tool?

The ping is the small packet I mentioned.

You don't give more bandwidth to an .exe. You usually analyze the traffic, and find something unique (IP address, protocol, etc), and give that priority in your router (usually, ppl don't have these expensive routers though)
In the old days with 28k modems, there were programs that could do that, but with current broadband connections, those programs became obsolete.

Ok so I have the IP the protocol  and the access to the router,which option to look in router to give priority if u don't mind

Only really expensive routers can do it, it's in the QoS menu.

Also, if you're sure you only need it on this computer, and you're sure, only one .exe needs priority, buy this program: https://www.netlimiter.com
Of course, if you meant with "more bandwith for a .exe" as in, more bandwidth than your ISP provider stated, it won't help.
If you are using more internet devices, it also won't help.

mmmmm i didn't find QoS i find only this:

Bandwidth Control Rules List
ID	Description	Egress Bandwidth(Kbps)	Ingress Bandwidth(Kbps)	Enable	Modify
Min	Max	Min	Max
The current list is empty.
Add New...




Bandwidth Control Settings
Enable Bandwidth Control:	
Line Type:	   ADSL          Other
Egress Bandwidth:	
512
   Kbps
Ingress Bandwidth:2048	

Select allOpen in new window

thanks man