Matt Cutts explains how search engines work. Find out more about how Google works. This will help you understand how key words rank in Google.
 

This video helps you understand what process is used to make changes to Google algorithms everyday. Each idea for changes goes through rigorous scientific testing and discussion. This will help you understand how complicated fine tuning a search engine algorithm can be. 
Learn how Google ranks websites. This will help you understand how your website is ranked.  

Summary
How Do Search Engines Work?
Title
How Do Search Engines Work?
Description

These videos will help you learn how Google works including how Google ranks your website. This is valuable information to help you understand how Google works.