A backlink is a hyperlink from one website to another. Backlinks are important for search engine optimization (SEO) because they signal to search engines that other websites consider the linked website to be a valuable and authoritative source of information. Search engines use backlinks as a measure of a website’s quality and relevance, and the number and quality of backlinks can affect a website’s search engine ranking. High-quality backlinks from reputable and relevant websites are more valuable than low-quality or irrelevant backlinks. Backlinks can be acquired through various methods, such as content creation, influencer outreach, guest blogging, or directory listings.