From the search engine's perspective, backlinks represent a recommendation for your website or content. For this reason, they are used to assess relevance. Since websites and online shops can significantly increase their search engine rankings through good backlinks to relevant search queries, the quality of the backlinks is also evaluated by the search engine.
However, search engines don't like it when links are manipulated—that is, when links are actively built. This practice is actually unavoidable in SEO; it's a delicate balancing act that search engines quickly view as unnatural link building and penalize.
Image Google Penguin UpdateIn Google's case, it is the australia cell phone number list Penguin update , which has been cracking down on links bought, exchanged, or placed on a large scale by webmasters and SEOs since 2012. In September 2016, Penguin was permanently integrated into the Google Core Algorithm. Penguin's sensors raise the alarm when
Links with a very hard anchor text (e.g. life insurance)
Links from the footer (site-wide and in the non-visible area)
Backlinks that have been created unnaturally (e.g. commercial)
Unnaturally fast backlink development (period)