Quality link stands for the inbound link that comes from the relevant, trusted, or authoritative site. Such links are a green light for the search engine to show up a site as a good resource worth presenting to users, and consequently, the site gets better rankings.
By increasing the number of high-quality links from various trustworthy resources, it becomes way easier to boost the web page rankings. That is why a quality link is also related to the white-hat SEO strategies and is often employed in link-building techniques.
There are 2 factors that influence the quality of the link:
- Authority. The webpage with the high authority rank that is linking to the other page can be a good hint for the search engines to mark the second one as a reputable source of information. In affiliate marketing, when authoritative pages make reference to the lesser-known pages regarding any subject, the last one can gain the benefits by significantly improving its rank positions.
- Relevance. For the search engine algorithms, the sites that provide more information regarding any topic can provide better results on the users’ queries. By estimating the real value of the page, search engines can determine which page link is more relevant and what rank it should get.
And vice versa, low-quality links are those marked as irrelevant or even harmful, contain various errors, and provide a poor user experience.