Contextual link building requires the most difficult types of links to get but they have a strong impact on search rankings.
The truth is that links are still the most important component of the search algorithm. No matter how useful its content may be, a site without links is far less likely to rank highly in organic search results.
Contextual link building — links that are surrounded by text in the body of content — have a higher SEO value than links that appear in the footer or sidebar.
Contextual backlinks are links that are embedded within content, such as a blog or article, rather than something like a business directory.