The process of collecting links on other websites that point to your own website is known as link building. Obtaining links from websites that are relevant to your products and services can dramatically boost the search engine value of your website. Strategically placed links on other websites can result in more traffic and a higher SERP (search engine ranking position) in the main search engines.
Because search engines look at how websites link to each other to gauge website relevancy to specific terms, this technique aids in search engine optimization. The purpose of link building is to get and keep a large number of high-quality links coming into your website in order to improve your ranking in the major search engines.