Google page rank is important for each website. By doing both On-Page and Off -page proper way
Search Engine Optimization is then, quite simply, a smart way of writing, designing and building your website so that it is positively indexed by these search engines – or shows up in their top search results.
There are lots of techniques of SEO like directory submission, blog and article submission, forum and blog comments, and social bookmarking etc. Do SEO with ethical techniques and never use automation in SEO.
In off page technique you can do directory submission, bookmarking, citation submission, profile linking, social profile linking, press release submission, article submission and so on. By using these you can get effective results in serp easily.
In SEO that are different options for link building, In that two parts are Onpage Optimization and Offpage Optimization. In Onpage optimization put meta tags, fresh content and unique content on site and In Offpage optimization build link in quality sites and use different keywords in anchor text, also make branding of your site, it helps to improve traffic of your website.