Building backlinks is crucial to SEO success. The question is how to get them. It is easier with on-page content optimization because everything is up to you to decide, Building backlinks it looks like you have to rely on others to work for your success. This is partially true because while backlinks are links that start on another site and point to yours, you can discuss with the Web master of the other site details like the anchor text, ect.

The idea behind Building backlinks as part of the page rank algorithm is that if a page is good, people will start linking to it. And the more backlinks a page has, the better it is.
On the other side Building Backlinks is hard, boring, time consuming work. You spend hours and hours to find relevant websites to link to, then spend hours more and more sending email requests for backlinks, or submitting your sites on links pages.

One-way links

These are from websites that link to your site without you having to reciprocate. They are the best links to have, and the best way to get them is by submitting articles to places like blogs.

Using a blog you can build one-way links to your site very fast.