Keyword optimization was the only significant factor when it came to search engine optimization (SEO) ranking. Content creators quickly learnt the techniques through which they could stuff web content with lots of keywords so as to rank high. This spamming technique did not last long because the search engines through change in algorithms found a way of punishing them. Many of their sites were even de-indexed from search engine databases leading to total losses.
The Concept of Citations
The use of citations or link building was developed later through Larry Page - Sergey Brin thesis. The propositions formulated from this thesis were adopted and used in the building of the link