Inbound links are those links which originate from an external site to yours and outbound links start from your site referring an external one. Inbound links are also referred as backlinks. Backlinks are very important if you consider search engine optimization. The high number of backlinks to your site indicates that your website is so popular. This helps to increase the search engine ranking of your website. There are many websites providing backlinking service. You can make the best use of them if required. Most of the SEO companies try to create more number of articles with quality backlinks and distribute these articles to many different online portals, so that people will come to know about your website. This increases the chance of attracting more visitors to your site as well as ranking higher in search engine results. Some popular search engines like Google give more priority to backlinks than content or keyword.