Link Farm
A link farm is a group of separate, highly interlinked websites for the purposes of inflating link popularity (or PR). Engaging in a link farm is a violation of the Terms Of Service of most search engines and could be grounds for banning.
Mirror
In SEO parlance, a mirror is a near identical duplicate website (or page). Mirrors are commonly used in an effort to target different keywords/keyphrases. Using mirrors is a violation of the Terms Of Service of most search engines and could be grounds for banning.
PFI
Abbreviation for Pay For Inclusion. Many search engines offer a PFI program to assure frequent spidering / indexing of a site (or page). PFI does not guarantee that a site will be ranked highly (or at all) for a given search term. It just offers webmasters the opportunity to quickly incorporate changes to a site into a search engine’s index. This can be useful for experimenting with tweaking a site and judging the resultant effects on the rankings.
Portal
Designation for websites that are either authoritative hubs for a given subject or popular content driven sites (like Yahoo) that people use as their homepage. Most portals offer significant content and offer advertising opportunities for relevant sites.
PPC
Abbreviation for Pay Per Click. An advertising model where advertisers pay only for the traffic generated by their ads.
PR
Abbreviation for PageRank - Google’s proprietary measure of link popularity for web pages. Google offers a PR viewer on their Toolbar.
Robots.txt
Robots.txt is a file which well behaved spiders read to determine which parts of a website they may visit.
Scumware
Scumware is a generic/catch-all label that applies to software that:
Installs itself secretly, dishonestly or without consent
Does not allow for easy uninstallation / removal
Monitors or tracks users actions without the users awareness or consent (aka spyware)
Alters the behavior/default options of other programs without the users consent or awareness (aka thiefware)
SEM
Abbreviation for Search Engine Marketing. SEM encompasses SEO and search engine paid advertising options (banners, PPC, etc.)
SEO
Abbreviation for Search Engine Optimisation. SEO covers the process of making web pages spider friendly (so search engines can read them) making web pages relevant to desired keyphrases
SERP
Abbreviation for Search Engine Results Page/Positioning. This refers to the organic (excluding paid listings) search results for a given query.
Spam
In the SEO vernacular, this refers to manipulation techniques that violate search engines Terms of Service and are designed to achieve higher rankings for a web page. Obviously, spam could be grounds for banning. Alan Perkins has published an excellent white paper on Search Engine Spam that is highly recommended.
Spamdexing
Spamdexing was describes the efforts to spam a search engine’s index. Spamdexing is a violation of the Terms Of Service of most search engines and could be grounds for banning.
Spider
Also called a bot (or robot). Spiders are software programs that scan the web. They vary in purpose from indexing web pages for search engines to harvesting e-mail addresses for spammers.
Spider Trap
A spider trap refers to either a continuous loop where spiders are requesting pages and the server is requesting data to render the page or an intentional scheme designed to identify (and “ban”) spiders that do not respect robots.txt.
Splash Page
Splash pages are introduction pages to a web site that are heavy on graphics (or flash video) with no textual content. They are designed to either impress a visitor or complement some corporate branding.
Stop Word
Stop words are words that are ignored by search engines when indexing web pages and processing search queries. Common words such as the.
www2/www3/www-xx
Google dance watchers use these terms as short-hand to refer to Google’s different datacenters. You can add .google.com to the end of them to visit the data center that corresponds to the term.
View the complete search engine optimisation glossary.