•    CMS Content Management System: Internet programs like as Word Press and software application that are made to manage a content known as to be CMS. A person without much coding skills can handle a content management systems.

•    Code Swapping (bait and switch):
Here the content change is done when high rankings of the sites are being achieved.

•    Canonical Issues: This is referred to the duplicity of the content and is very hard to stop and avoid.   

•    Click fraud Improper: This word is used for the deliberate clicks on a PPC advertisement by a publisher to generate undue profit. The add agencies like Google reserves the objection to the click fraud activities.

•    Cloak: This is SEO practice where an invisible content to human eyes is served to the search engines. This is considered as the Black Hat practice by search engines and is penalized by search engines by banning a site on the search engine.

•    Comment Spam: This is referred as to the practice of posting blog comments merely for the purpose of generating an inlink to another site.

•    CPC Cost Per Click: The rate which is paid for and to a Pay Per Click Advertiser

•    CPM (Cost Per Thousand impressions): This is a metric that is used to calculate out the average cost of the Pay Per Click advertisements.

•    Crawler (bot, spider):  An application that roams around the internet on the means of the link structure to collect data.

•    Content (text, copy): This is a text on a website which is very important and possesses the certain value to the user.  Advertising, navigation, branding and boilerplate are not generally considered as to be the content. .

•    Contextual Advertisement: The content feeding as related to the advertising. 

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