What is good method to increase back link?

The best method to increase backlinks is link building. You should focus on building relationships with the target audience. It may be comments and advertising. The goal is not just to get links, but maximize the number of interactions with your greater community.
 
Off page seo is useful to get good Backlinks to your site.It includes,
>social bookmarking and directory submission
>article and forum posting
>social networking sites
>blog commenting and blog marketing
>search engine submission
>link baiting
>video marketing and photo sharing
 
You can get backlinks to your site from many places.Best way is to promote your site to social networks (Twitter, Facebook..), bookmarking sites (Digg, Stumbleupon...), Article directories (Ezine articles, GoArticles...) and web 2.0 (Squidoo, Hubpages...). You will also get natural traffic to your page from users visiting those sites. Or you can buy links from websites like SEOclerks.
 
The best methods to increase backlink are:


Make your website interesting to your audience

The content of your website must be informative and unique.

Create relevant backlinks to your website from niche websites

Participate in directory submission and social bookmarking.
 
Quality content.
Interesting content.
Above all unique content.

As high the value of your content would be, so high the page rank of your website would be.

So just focus on your work.It should be honest and pure.

Apart from that you should follow SEO off page techniques like

Social bookmarking
Forum posting
Commenting
Blogging
Video and picture sharing
 
There are a lot of things you can do to increase backlinks. I would suggest to start with creating content that is useful and relevant to your audience and then make sure that you're engaging with that community. If you're already doing that, then do the link building. Link building also is very helpful to increase backlinks.
 
void site wide link from footer (WordPress themes or plugins)
Avoid buying exact anchor text link (Keep a proportion of 40%-20%–20%-10%-10% for anchor text variation)
Avoid buying bulk links from sites like Fiverr
Don’t opt for link networks (Build my rank was one of such private link network, which got penalized)
Avoid BlogRoll links
Article directory links are not that effective anymore
 
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