LEARN ONPAGE BASICS

On page SEO or search engine optimisation is making sure that your website is as search engine friendly as possible. If your website is not optimised then you have less chance of getting good results in the search engines.
Their is 14 tips OR Guidelines of on page seo
1- All of your web pages can be indexed by search engines - make sure that they all have at least one link from somewhere on your site.
2- You have unique content on every single page.
3- Meta-tags are arranged correctly - your page title tags and description tags should describe the content of your different web pages. The page title tags should be less then 68 characters and the description tags more detailed but less then 148 characters.
4- Label the different headers on your web pages using H tags.
5- Your web page URLs are SEO friendly, use mod re-write for Linux and Apahche hosting or use IIS redirect for Windows. Ideally make it so that the URLs describe your content i.e. use domain.com/blue-widgets.php as apposed to having something like domain.com/product.php?cat=146. Use hyphens or underscores to separate words in the URLs.
6- The links within your site are complete i.e. if you are linking to the blue widgets page link to domain.com/blue-widgets.php as apposed to just blue-widgets.php.
7- Use descriptive URLs for your images i.e. use blue-widget.jpg as apposed a bunch of numbers and or letters .jpg.
8- Label all of your images with descriptive alt attributes.
9- Make good use of anchor text links within your content - if you have a page about blue widgets, use the phrase blue widgets in the text that links to it.
10- There is only one version of your site - 301 redirect all non www. URLs to the www. ones or vice versa.
11- There is only one version of your homepage - 301 redirect the index or default page back to domain.com.
12- Don't waste PageRank on pages that you don't need to be in the search engines or that you don't think will bring you traffic, possibly your terms and conditions page or even your about and contact page. Use the rel="nofollow" tag in the links to these pages.
13- Use the rel="nofollow" tag in the links to websites that you do not trust, you think maybe using spamming techniques or you do not want to help in the search engines.
14- Make sure that your code is valid, in some instances bad code can lead to search engines not being able to properly read a page. Use the W3C validator to check your markup.