Hi guys,
The following information is for all of the novice in web hosting world. It's adapted from some website which i don't remember.

.Difference between shared hosting and dedicated hosting-
The primary difference between dedicated and shared hosting is how the web server is used. With Shared web hosting, the web server is shared between many different websites. With dedicated web hosting, the web server is dedicated to your web site. Both services have their advantages and disadvantages.
Dedicated hosting is any day expensive than shared hosting.