Cache – Collection of web pages stored locally on the user’s hard drive or in the database of a search engine is called a ‘cache;’ it helps in easy retrieval of previously downloaded documents.
Call To Action – Action words such as "Click here," "Buy Now," "Enter Now" or "Click to download” are used in online advertising to incite the reader to action.
Clickthrough & Clickthrough rate(CTR) – When an ad on your webpage is clicked, it is commonly known as Clickthrough. Likewise, ‘Clickthrough rate’ refers to the rate at which Internet users click on a link that may be a search engine listing or a banner ad.
Cloaking – This is one of the Black SEO techniques by which the search engine is tricked into giving the site a higher ranking by providing visiting spiders keyword-rich content. In reality, the site incorporates different and unrelated content.
Content Integration – Portals and other large sites have editorial content that includes advertising material; this is known as Content Integration.
Conversions & Conversion rate – Conversion refers to the act of a visitor becoming a client by signing up for a newsletter or accepting an offer. Conversion rate refers to the speed at which such conversions happen.
Cookie – When a user is browsing on a web server, some data automatically gets stored on his computer such as email address, referring advertiser, order number, and others. This stored information is easily retrievable at a later date and are used to distinguish the user’s movement from one point of time to another.
Cost Per Action (CPA) – Specific actions taken on the web such as agreeing to receive an email newsletter, joining a contest, registering on the site, taking a survey, downloading trial software, printing a coupon, etc., have a cost associated with them; this is known as Cost Per Action.
Cost Per Click (CPC) – A clickthrough also has a price associated with it called the Cost Per Click.
Cost Per Lead (CPL) – Cost of the number of new leads generated; lead refers to users who became potential clients by clicking on an ad and the advertiser pays for these leads.
Cost Per Order (CPO) – Also known as cost-per-transaction, it refers to the number of orders received as a result of users clicking on your ad.
Cost Per Sale (CPS) – After the order is received, a sale transaction takes place related to your ad; the user may make numerous visits to the site before closing the sale which are tracked by the cookies.
Cost Per Thousand (CPM) – Cost of a thousand impressions.
Counter – The program engaged in counting the number of webpage impressions is called Counter.
Crawler – Same as Spider.
Custom error page – When a page is not available, a 404 File Not Found page is displayed. This page attempts to direct user to similar sites by posting a friendly message that informs that the page is not available but other similar sites maybe explored.
