Link building can increase the number of high-quality links pointing to a website, which in turn increases the likelihood that the website will rank high in search engine results. Link building is an essential factor of SEO as it helps search engines discover new sites and determine which pages should rank higher in the SERPs.
Link building is the most important ranking element for Google, alongside on-page SEO and content optimization.
For this reason, link building is very important and useful for all Internet sites.
