In Search engine optimization (SEO), link building is the process of getting hyperlinks from other websites to your website. It aimed at enhancing the quality and number of inbound links to a webpage. As a SEO point of view link building is among the primary tasks required for search engine ranking and traffic success. Through links search engines not only determine the popularity of a website and pages based on the number and popularity of pages linking to them, but also analyze - spam, authority and trust metrics of a website. Trustworthy websites tend to link to other authorized and trusted sites while spammy sites receives very few links from trusted sources. To earn trust of search engines, you'll need the help of more popular and better link partners. Search engines use links as a signal to determine the ranking of a web page. This implies that increasing the number of high quality links pointing to your website or a web page can significantly increase your chances of ranking well in SERP's.