Quality Backlinks- A quality backlink is defined as a backlink that comes from a website which has content related to your niche example if you have blogging site then you link to a high PR site that has a blogging topics. Quality backlink comes from site’s which uses your keywords or site’s of same theme. Suppose, www.blogs911.com receives a backlink from a site using same keywords or on same theme such as blogging, SEO, Make money online etc, this link is regarded as quality Backlink rather than it receives a link from an Automobile website. Search engines gives high importance to the link which comes from blogging site and give less relevance to the link which comes from Automobile site. Google gives high importance to quality links which comes from High PR sites. It considers .gov and .edu as most important I hope you understand what I mean to say.
Now let’s find out what are different types of backlinks ?There are basically two different types of backlinks one is “dofollow” and another is “nofollow”.
(1) Dofollow Backlinks- Dofollow backlinks are those backlinks which are followed by search engine crawlers during crawling your site. Or we can say when search engine crawlers enters your page, they crawl your whole blog including links, pics everything, when they crawl a “dofollow” link they, lands at that page. Suppose I link back to you, when crawlers crawl that link they lands at your page, which helps in indexing your site faster. It provides you with traffic as well as help in increasing your Pagerank.
Dofollow links allow google (all search engines) to follow them and reach our website. Giving us link juice and a backlink. If a webmaster is linking back to you with this link both Search Engine and Humans will be able to follow you. The best way to give someone dofollow love is allowing keyword in the anchor text. This means when you are linking to any website or page, use the targeted keyword as anchor text.
Example of Dofollow Link:
Nofollow is an HTML attribute value used to instruct some search engines that a hyperlink should not influence the link target’s ranking in the search engine’s index. It is intended to reduce the effectiveness of certain types of search engine spam, thereby improving the quality of search engine results and preventing spamdexing from occurring in the first place. This is a concept introduced by Matt Cutts and Jason Shellen in the year 2005.
Example of Nofollow Link:
<a href=”http://www.google.com/” rel=”nofollow”>Google</a>