This refers to the process by which search engines display websites so that the most relevant websites appear on the top. Search engine optimization is a technique by which high rankings may be obtained.

When two sites link to each other.

The referrer is the URL of the web page that a user was at before reaching yours. The server's logs capture referral URL's and store them in their log files. Furthermore, if a user used a search engine to find your website, the key phrases they used to find your site will be embedded in the referring URL. Intelligent log analyzers can then take this data to track how many visitors originate from each key phrase.

Services that submit your website to search engines for inclusion are referred to as submission services. These can be either automated programs or manual hand submission. This is un-needed if your site is properly optimized.

This is an automated program that automatically traverses the Web's hypertext structure by retrieving a document, and recursively retrieving all documents that are referenced. Please refer to spider for more information.

This is a text file that is used to control spiders that visit your website. Only spiders that conform to the Robots exclusion standard will obey the contents of the robots.txt file. This file allows you to grant and exclusive access to certain folders, file types, and specific files depending on the robot accessing the site. This file is not necessary for your site. For more information, visit - http://www.robotstxt.org/wc/robots.html.

Short for return on investment.