Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20110809005414/http://www.searchengineoptimising.com:80/glossary/seo-glossary-of-terms/co-citation
Co-citation is mainly used in topical authority based searches when algorithms and links that are close to each other are said to be related. In LSI words that tend to appear next to each toher in searches are thought to be related also.
SEO Resources 
