https

I have never used my https server. I just have a simple question. What makes the https server more secure than a standard http server?

Encryption - generally 128bit, lately moving to 256bit.

some more details, just in case:
1. when you browse the internet, your browser send information.
when you submit form, the details you filled are sent via something
known as "http headers" to the processing server.
2. normally, those details are sent as plain text, as-is, and anyone
can catch and read it, in theory.
3. SSL encrypt all those details in such manner that even if
someone "catch" the details, all he get is encrypted string. no
plain text and he can't do anything with that.
128bit means the key used in the process of encryption is 128 bits
long i.e. in binary form it has 128 digits of 0 or 1.

that's what I know, I'm not 100% sure I'm correct in everything so
I'll be glad to stand corrected if needed... I just prefer having it
simple rather than going through complicated technical terms.

Read the following links (below).
Wikipedia is usually a good place to start for such general questions. Try www.howstuffworks.com as another options well.

http://en.wikipedia.org/wiki/HTTPS
http://en.wikipedia.org/wiki/Transp...er_Security-SSL
Understanding SSL