Link building is indispensable for SEO

Also, Try to get links back to as many pages as you can within your website. Don’t simply focus your links on the homepage. Any link is a good link--from sources such as directory submissions and press releases--that includes the keyword in the anchor text. Don’t be too focused on what type of link or its source.

Nice information and helpful one.

There are 3 main factor on top ranking.

1. Onpage.
There is a limit for onpage factors. If everything is perfect, you cant do anything more.

2. Contents.
If you have unique contents, you can get top ranking.

3. Backlinks
This is the factor, you can easily manipulate to get better ranking. Thats why most webmasters use this factor to get top ranking.

Variety is the name of the game with link building. The goal is to make your site's online presence look as natural as possible. Every good link building campaign should involve trying to acquire links on pages and sub pages of varying page rank and relevancy.

Link building is important factor for SEO because without link building your website not get backlink.

Google decides about PR of a website on the basis of number of quality backlinks.

Quality links is what you need for a successful SEO

SEO is about building up the volume and quality of traffic to your site, and link building is a crucial part of your success. Quality web traffic is possible only through link building which in turn improves the popularity of the website