The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Web wide crawl with initial seedlist and crawler configuration from October 2010
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20101206215450/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/bannerad
Banner Ads are the advertising links that are often across the top or down the sides of a webpage. They create revenue for the website owner and they can then offer free content.