purpose of Local server

I am little bit confused about the concept of local server. I have basic Questions
1: what is mean by local server?
2: It's purpose?
Kindly give an example about that.
Thanks

Not sure what you mean by local server without a bit more context. If you mean localhost, it's shorthand for "the server I'm running this code on" you might use it when testing web pages by running a browser on the machine that serves them up.

Alternatively, local server may just mean a server on my LAN as opposed to a server out on the internet somewhere.

arslankhan:
I am little bit confused about the concept of local server. I have basic Questions
...
Kindly give an example about that.

Kindly explain what this is to do with Arduino.