Link Building: What It Is and How It Works
In the field of search engine optimization, link building describes actions aimed at increasing the number and quality of inbound links to a webpage.
In SEO, links aren’t everything—but search professionals attribute a large portion of the engines’ algorithms to link-based factors.
Through links, engines can not only analyze the popularity of a website & page based on the number and popularity of pages linking to them, but also metrics like trust, spam, and authority.
Link building is almost always the most challenging part of an SEO’s blog, but also the one most critical to success. It requires creativity, hard work, and often a budget.
No two link building campaigns are the same, and the way you choose to build links depends as much upon your website as it does your personality.
Below are three basic types of link acquisition.
Links that are given naturally by sites and pages that want to link to your content or company. These links require no specific action from the SEO, other than the creation of worthy material (great content) and the ability to create awareness about it.
The SEO creates these links by emailing bloggers for links, submitting sites to directories, or paying for listings of any kind. The SEO often creates a value proposition by explaining to the link target why creating the link is in their best interest.
Examples include filling out forms for submissions to a website award program or convincing a professor that your resource is worthy of inclusion on the public syllabus.
Hundreds of thousands of websites offer any visitor the opportunity to create links through guest book signings, forum signatures, blog comments, or user profiles. These links offer the lowest value, but can, in aggregate, still have an impact for some sites.
In general, search engines continue to devalue most of these types of links, and have been known to penalize sites that pursue these links aggressively. Today, these types of links are often considered spammy and should be pursued with caution.
Source: Moz