IDFInverse Document Frequency is a term used to help determine the position of a term in a vector space model.
image mapAn image divided into logical areas, each of which has a hot spot.
ImpressionThe number of times your search ad is served to users by search engines.
Inbound LinkA hypertext link to a particular page from elsewhere, bringing traffic to that page. Inbound links are counted to produce a measure of the page popularity.
Inbound links (IBL)Links that point to your site from sites other than your own. Inbound links are an important asset that will improve your site's PageRank (PR).
IndexStatistical measure of the state of the stock market or economy based on the performance of stocks or other components.
Information ArchitectureDesigning, categorizing, organizing, and structuring content in a useful and meaningful way.
Information RetrievalThe field of science based on sorting or searching through large data sets to find relevant information.
InktomiSearch engine which pioneered the paid inclusion business model. Inktomi was bought by Yahoo! at the end of 2002. Internal Navigation (see Navigation)
InlinksA synonym for back links. Popularized by Yahoo!
Insertion Order (I/O)A contract that specifies the details of your search advertising campaign, including placements options, keywords, ad creative, landing page, pricing…
Internal LinkLink from one page on a site to another page on the same site. It is preferential to use descriptive internal linking to make it easy for search engines…
Internal LinksAn Internal Link is a hypertext link that points to another page within the same website.
InternetA worldwide network of networks that all use the TCP/IP communications protocol and share a common address space.
Internet ExplorerMicrosoft's web browser. After they beat out Netscape's browser on the marketshare front they failed to innovate on any level for about 5 years, until…
Interstitial AdAn ad page that appears for a short period of time before the user-requested page is displayed. Also known as a transition ad, splash page, or Flash page.
Inventorya detailed accounting of all items within a specified location. Examples include but are not limited to: evidence in the evidence vault, evidence in the…
Invisible WebPortions of the web which are not easily accessible to crawlers due to search technology limitations, copyright issues, or information architecture issues.
IP AddressA string of four numbers separated by periods used to represent a computer on the Internet.
IP DeliverySimilar to agent name delivery, this technique presents different content depending on the IP address of the client.
ISP(Internet Service Provider). A business that delivers access to the Internet.