- Call to action
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The intended response a web site owner wishes site visitors to take when they view a web page. Various calls to action include order, purchase, subscribe, download, and click here. -
- Cascading Style Sheets (CSS)
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A feature of HTML developed by the W3C. They enable web designers and end users to create style templates (sheets) that specify how different text elements (paragraphs, headings, hyperlinks , and so on) appear on a web page. Style sheets can also be used for positioning elements on a web page. Currently, not all browsers express CSS formatting in the same manner. -
- CGI
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Abbreviation for common gateway interface. CGI refers to programs used to produce content for browser delivery. Common CGI programming languages include Perl, C, Java, and Visual Basic. -
- Classification
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The process of organizing information into topical categories, usually in a hierarchical structure. -
- Click-through or click-thru
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The process of clicking a link from one web page to go to another web page. In search engine marketing, it is the process of clicking a link from a search results page to a specific web page. -
- Click-through popularity or click-thru popularity
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In search engine marketing, the number of times end users click the link from search engines to a web site and how long end users stay on the site after they click the link from the search engine. Some search engines use click-through popularity to determine relevancy. Also known as click tracking . -
- Cloaking
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The process of delivering custom content to a search engine spider that is hidden from site visitors. With cloaking, search engine spiders see one page, and visitors view another page with different content. -
- Clustering
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Listing only one or two pages from each web site in a search engine's or directory's list of search results. -
- Comment tag
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An HTML tag used to hide content from browsers. Comment-tag content is placed between the <! -- and -- > symbols. Most search engines ignore the content placed between these symbols. -
- Concept search
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A search for documents related to a keyword or keyword phrase. Different from a search specifically containing the keyword itself. -
- Content page
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Another term for an information page. - See also [information page.]
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- Conversion rate
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The measure of the number of specific calls to action divided by the total number of unique page visitors. For example, if 10 visitors purchase a product or service and 100 visitors view the web page, the page has a conversion rate of 10 percent. -
- Cookie
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A message given to a web browser by a web server. One of the main purposes of cookies is to identify web site users/visitors and possibly prepare customized web pages for them. -
- Counter
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A program or script that measures the number of hits on a web page. Can also measure the number of page views on a web site. -
- CPA
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Abbreviation for cost per action. Type of advertising in which a web site gets paid each time an end user performs a desired action. -
- CPC
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Abbreviation for cost per click. Type of advertising in which a web site gets paid each time an end user clicks a link to the advertiser's web site. -
- CPM
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Abbreviation for cost per thousand. Type of advertising in which a web site gets paid based on the number of impressions . Calculated in blocks of 1000. -
- Crawler
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Another word for a search engine spider. - See also [spider.]
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- Cross linking
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Linking among web pages within the same web site. -
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