In SEO, link building refers to the strategy of improving search engine rankings by getting external pages to link to specific pages on your website. Link building is important because it can help your website’s rank and make you look more credible to search engines. However, the quality of links is also really important. Receiving tons of links from spammy sites can hurt your website’s rank and hinder your likelihood of getting to the top of the search results. Link building is one of the trickiest aspects of SEO, but also one of the most important.