If you want to do SEO optimization or even to increase the pagerank for your site, you definitely need a backlink. If one-way backlinks to your site is very little, then the high pagerank of your site will go down. Apparently the number of backlinks is very influential on the increase SERP article on your site. Suppose you're doing SEO optimization on your site. Then you must find backlink as much as possible so that the article can get a respectable position in search engines.
Quality backlinks in the era of the past has been concentrated on a few things that might be is still used as the ultimate weapon to boost your websites position on search engines.
One way backlinks are backlinks leading to your blog such as wikipedia.org. The number of links that point to wikipedia.org make search engine spiders crawling your subscription at any time. If there is a good blog post we will most likely be used as a reference source by other blogs to get one way backlinks. If you want to look for quality backlinks you can buy backlinks from qualified blogs or websites.
But not all backlinks will give good results for SEO. In other words not all backlinks have good quality. Only some good quality backlinks will help your site on the good rank. Try to check backlink on your article. Well it turns out that not all backlinks appear in google search engine.
Then how do I get quality backlinks? The good quality backlink is located on the front page on the site. Location of a quality backlink is usually on the sidebar, post content, footer web / blog especially in the sidebar and footer, because every web page / blog that we planted backlinks (sidebar / footer) will always be visible. Imagine if your web / blog have 300 pages. The higher the rank of the site and the more slender the alexa rank, then that it would be better obtained backlinks.
Why so? Because backlinks are placed on the front page on a site, then automatically backlinks will be listed in every article. So the more articles on a site the more backlinks will be gained. Well this is a key part of SEO.