One business benefit of SEO is an excellent cost effective long term Return on Investment from 24/7 online promotion. Also, coupled with an attractive functional website, SEO should bring you more inquiries, more sales and more business.

AP refers to Angela's and Paul's links - They are higher page rank websites where visitors can subscribe and create profile to put do follow one way backlink on their profile.

Keyword stuffing is a signpost of a very low quality spam site. Keyword stuffing is something Google clearly recommends you avoid otherwise your site might get kicked out of Google completely.

There are many reasons such as
-The sites are very well optimized with a number of good quality backlinks
-The sites have very high Pageranks
-The sites are very old and they look like authority sites in the eyes of Google.

Web traffic which comes from unpaid listing at search engines or directories is commonly known as "organic" traffic.

A referral occurs when any hyperlink is clicked that takes a user to a new page of file in any website - the originating site is the referrer.

If you want to improve your adsense revenue, add more content and more pages to your site, increase your link building effort on your deep links and exchange links with similar sites.

A footer link is a small text at the bottom of the page. It is either click able text or text containing copyright notice. The footer link or footer text is best for increasing the keyword density in a site and is an important area for the search engines to look for.

Google does not say when it will update the Page rank, I guess it does that to avoid people manipulating sites or links.

Google AdSense is a program in which enterprises can display Google advertisements on Web sites and earn revenue from hits that generate traffic for the Google search engine.

-write unique and interesting articles
-Put keywords in the articles
-Submit the articles to trusted article directories

and don't forget to social bookmark the articles links.