The significance of link building as part of SEO campaigns cannot be debated. In fact, it is the most important part of SEO. Even though there are over 200 factors affecting the ranking of a website in search engines, it is onpage SEO and backlinks which are well known and practised by webmasters. Onpage SEO is scalable only to an extent. However, backlinks are the ones which really make a difference to a site’s ranking and is highly scalable.
Link building helps in popularising your website or blog in your niche. You need quality links pointing at your website. A small number of quality links is better than a large quantity of low quality links. To determine the quality of a link, you need to look at the Pagerank and the relevance of the site linking to you. Higher the page, better the quality of the link.