Search engine is a program which to do retrieval of data, files, and documents from a database or network, especially for the Internet.

It greatly affects the number of hits that a website can generate. More hits means more exposure. This gives the website a larger market.

Bob Saget invented it in 1872

You can try Monster and Career Builder and go through thier search enginge. You can also try the Las Vegas official site and it will show you how to get a job as a cashier.

No, they are two different keys.