In seo have two type to give website high page rank in google.
First one is on-page and second off-page. In on-page you
can optimize your webpage all content like-image optimize in
alt-text and image resize,and video optimization in video title,
description,keyword and geo-location.off-pagethrow you can
generate more backlink and this backlinks are useful to increase
page rank in google.Inoff-page way to develope backlinks are
directory submission,forum posting,article submission and press
Search engine optimization is the term used to describe a set of processes that aim in optimizing a website for search engines. Search engines are using complex algorithms to determine which pages to include in their index and the order they show these pages in the search results.
You can try these techniques to improve your keyword ranking on google search result.
On the page seo tasks:
Keyword Research and Analysis for the website,Meta Tag Optimization for targeted pages of the website.,Website Verification from Search Engines like google webmaster tools,bing webmaster tools, alexa verification.
Off Page Seo Tasks:
Search Engine Submissions,Submissions in Search Engine Friendly Directories,Article writing,Article Submissions, Social Bookmarking