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What is Impression? |
It is said that you never get a second chance to make a first impression. Well, in the wonderful world of the World Wide Web, publishers have thousands of chances each day. An impression is counted each time a Web page is shown to a visitor. Advertisers measure the reach of their ads by tracking ad impressions, or the number of times their ads are shown. The revenue that publishers generate based on 1,000 impressions is called CPM.
Impressions are counted each time a page is visited by a user, so a single user can rack up numerous impressions for one website. However, publishers and advertisers are also interested in unique impressions, which count only the number of unique visits to a website. For example, if Greg views 3 pages on a website, while Mary views 4 and Kathy views 10, their visits would total 17 impressions, but only 3 unique impressions. Unique impressions are usually counted by sending a cookie to visitors' browsers that expire in 24 hours. This way, if Greg visits the site on Tuesday morning and Wednesday evening, it would could as two unique impressions. |
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Sharpened Glossary |
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Popular terms beginning with 'I': |
What is IEEE?
Stands for the "Institute of Electrical and Electronics Engineers." This is a non-profit organization that develops, defines, and reviews electronics and computer science standards. Though it is a U.S... continue
What is ISP?
An Internet Service Provider (ISP) is a business or organization that offers users access to the Internet and related services. Most telecommunications operators are ISPs. They provide services like i... continue
What is IDE?
Stands for "Integrated Device Electronics." It is the most widely-used hard drive interface on the market. The fancy name refers to how the IDE technology "integrates" the electronics controller into ... continue
What is ISA?
Stands for "Industry Standard Architecture." ISA is a type of bus used in PCs for adding expansion cards. For example, an ISA slot may be used to add a video card, a network card, or an extra serial p... continue
What is IRQ?
Stands for "Interrupt Request." PCs use interrupt requests to manage various hardware operations. Devices such as sound cards, modems, and keyboards can all send interrupt requests to the processor. F... continue
What is Intranet?
Contrary to popular belief, this is not simply a misspelling of "Internet." "Intra" means "internal" or "within," so an Intranet is an internal or private network that can only be accessed within the ... continue
What is Icon?
Ever since the Macintosh was introduced in 1984, icons have been the way we view files on computers. An icon on your computer screen represents an object or a program on your hard drive. For example, ... continue
What is Install?
Most software programs require that you first install them on your computer before using them. For example, if you buy Microsoft Office, you need to install it on your computer before you can run any ... continue
What is IO?
Stands for "Input/Output" and is pronounced simply "eye-oh." Computers are based on the fundamental idea that every input results in an output. For example, if you are running a word processor program... continue
What is ICS?
Stands for "Internet Connection Sharing." ICS allows multiple computers to connect to the Internet using the same Internet connection and IP address. For example, several computers in a household can ... continue
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