CMS
CMS stands for Content Management Software. CMS is a type of software program that allows you to create database driven websites such as search engines or online portals. This website has been built using CMS Software.

Counter
A web counter is a numerical display showing how many times a webpage has been retrieved from a server, or viewed on a web browser in simple terms. Many websites display counters on their home pages to show visitors how popular the site is. If a counter is showing 10,000 then that page has been viewed 10,000 times.

CPA
CPA stands for Cost Per Action, and relates to the fee charged everytime a user completes a specified action, such as downloading a program or registering for a newsletter. CPA advertising is very popular amongst advertisers as they can specify the action that they wish to be completed, and specify the amount of commission, or fee, that they are prepared to pay publishers for sending them visitors. CPA is similar to CPL.

CPC
CPC stands for Cost Per Click, and relates to the fee charged every time a user clicks on a banner or text advert. CPC advertising is popular with both advertisers and publishers.

CPL
CPL stands for Cost Per Lead. CPL advertising is very popular amongst both advertisers and publishers. In order to earn a commision the publisher must send visitors to the advertisers site, where they must complete a certain criteria, such as signing up to a newsletter or completing a survey. In CPL advertising the advertiser controls the criteria that a visitor must complete before commissions are paid out, whilst publishers can expect to earn higher rates of commission than with CPC or CPM advertising. CPL is similar to CPA.

CPM
CPM stands for Cost Per Thousand Impresssions and is a way for advertisers to buy advertising space on a given website or network. If an advertiser buys 1 CPM, they are paying for their banner or advert to be shown 1000 times. The publisher who owns the website where the banner will be displayed receives a flat fee for displaying the 1000 impressions, regardless of how many clicks the advert may receive. If the advertiser pays $100 per CPM, then each impression costs 10 cents.

CPS
CPS stands for Cost Per Sale, and is the fee, or commission, charged everytime a user completes a purchase.

Crawler
A web crawler, also referred to as a web spider, is a program which browses the world wide web, recording information about the web pages it visits for later processing. Search engines employ web crawlers or spiders to gather information on web pages for inclusion in their search results. As well as recording information about the web pages visited, the crawlers also index the pages, which helps to speed up later processing and future crawling.

CTR or Click Through Ratio
Click Through Ratio is the ratio of clicks to impressions for a given advert. If an advert, whether banner or text, has been displayed 1000 times, and has received 100 clicks, then the advert is said to have a CTR of 10:1, or 10%. CTR is used to determine how popular an advert has been. The higher the CTR, the more clicks an advert has received. In reality, most advertising campaigns achieve a CTR anywhere between 1 and 5%, or 1 to 5 clicks per 100 impressions. If an advert is receiving a much higher CTR, such as 50%, then it is likely that some form of fraudulent activity is going on.