They are information inserted into the "head" area of your web pages.
Title Tags (<title>your title goes here</title>): Title tags are the 4-8 word titles describing each page on your Web site. These tell the browser what text to display in the title bar, and they are very important to search engines.
*Description Tag (<META NAME=“description” CONTENT=“your description”>): search engines use this to index it and it often provides the description for the SERPs if Google can’t find the keywords on the page. *Don’t use more than 150 characters here.
IMG tag (<img src=“kaplan.gif" alt=“Kaplan Logo"/> ) embeds an image in an HTML page. Provides alternative text if the image is not available.
All links from pages contained within the site and pages from other sites that point to your specific pages. Increasing link popularity and incoming links from other high ranking sites raises page rank .
Link building- backlinks are links that are directed towards your site, aka inbound links (IBLs)
Social media optimization ( SMO ) i.e. facebook, linkedin, digg
Article marketing ( online article syndication)
Forum marketing (writing on forums )
Classifieds Advertisements: www.craigslist.com has a page rank of 7
RSS Feeds : XML data feeds are predominately designed for large web sites or e-commerce sites with hundreds of different products that are mostly database driven (dynamically generated). Through normal spidering these pages might never be found and indexed. That’s why XML data feeds were created – as a means of getting deep content found by the search engines.