[5] This weighting of backlinks is analogous to citation analysis of books, scholarly papers, and academic journals.
[7] MediaWiki specifically offers the "What links here" tool, some older Wikis, especially the first WikiWikiWeb, had the backlink functionality exposed in the page title.
"[10] Knowledge of this form of search engine rankings has fueled a portion of the search engine optimization (SEO) industry commonly termed linkspam, where a company attempts to place as many inbound links as possible to their site regardless of the context of the originating site.
[11] In January 2017, Google launched Penguin 4 update which devalued such link spam practices.
[17] Changes to the algorithms that produce search engine rankings can place a heightened focus on relevance to a particular topic.
While some backlinks might be from sources containing highly valuable metrics, they could also be unrelated to the consumer's query or interest.
[18] An example of this would be a link from a popular shoe blog (with valuable metrics) to a site selling vintage pencil sharpeners.