Lets know what is SEO basically...
What is SEO?
        In search engine results, the earlier the site appears in the result
list, more visitors will receive it from search engine. Search engine optimization
is an art of creating web pages which will rank higher.

Keywords:
        These are the meaningful words which are useful for finding out
the required page. These are also called as queries. These include the relevant
list of words from the web page.

Indexed Page:
         When any website is hosted on World Wide Web, the crawler comes
to site and take the page which is most error free and will be used. These pages
are stored in the database of search engine like Google, Yahoo, MSN, etc. They are
called as indexed pages.

Steps involved in SEO:

       
These are followed to get a good Google page rank and search engine ranking.

Website modification: This step includes adding optimized content
to all pages in the website. This is necessary because targeted keywords have to
be added in the right density at the right places.

Add tags: Add or make changes to Meta tags, Title tags, H1 tags,
H2 tags, all in anchor text, and alt tags for images, after keywords research.

Link Building: Proper Page to page linking is done.

SEO Friendly Site:

       
Search engine optimization is a method of increasing the amount of visitors and
the awareness of a website by ranking high in the search engines. The higher the
rank of a website in the result of the search engines the better the chance the
website will be visited by users.If you have a well-organized website and have some
other websites linked with yours, so then you do not have any problems in being
ranked in the search engines. Since each search engines has detailed rules and algorithms
in order to determine how to ranked websites.

The Parameters which are useful for SEO friendly
site:

1. Website with a clear hierarchy and text links and offering at least one static text
   link to make every webpage reachable.
2. Offer a sitemap on the website and create information-rich web content. It should
   be interesting, significant and avoid redundancy.
3. Create useful, information-rich site, and pages that clearly and accurately describe
   content.
4. Offer accurate and explanatory Title and Alt tags in every web-page.
5. Make sure that there is no broken links or HTML error on the website.
6. Website usability or accessibility.
7. Ease of navigation.
8. Minimal use of flash and frames, animation.
9. Use the KISS principle. (Keep it simple and Stupid)
10. Use vibrant colors matching your theme, provide classy content and leave the rest
    to the SEO.

For more Info :

http://www.apogee-search.com/Services/SEO/top-rankings.php

http://www.websitedesigningpromotion.com/

http://www.desertseo.com/seo-services.html

http://www.desertseo.com/white-hat-seo.html