A company or organisation who providesdigital certificates to verify the identity of a store or website owner. Commonly used to issueSSL Certificates to verify an online store's identity and encrypt credit card details as they are transferred across the Internet.

Examples include: GeoTrust, Comodo, Thawte and Verisign. The SSL Certificates provided in Osc Works stores use the RapidSSL Certificate Authority.

These are transactions billed back to your merchant account - to reverse an online transaction. For example, if you give a refund on a transaction or something has been bought with a stolen credit card.

IP addresses are like telephone numbers for web browsers - they tell the web browswer where to go to find your website. The format of an IP address is four blocks of numbers of 0-255 e.g. 74.54.75.210. The third portion of this address is called the Class C block.

Search engines like Google sometimes look at the Class C values of an IP address in order to determine if a site comes from the same server. Sites on the same server do not always have as much "voting power" when they link to eachother. Google often gives preference in voting power of a link to sites that it assesses to come from different businesses.

Occurs in Pay-per-click advertising where someone or an automated script clicks on sponsored links with the intention of costing the advertiser money and not to buy or review the product. Click fraud is increasingly being made illegal in an attempt to prevent people from maliciously clicking on competitor's online advertisements.

Stands for Content Management System - Software that is added to your website to make it easy for you to manage your own website's content in a similar way to how you use a word processor. Pages can be created and edited and then published to the live site when completed - without you needing to know any HTML, have graphic design skills or be a computer expert.

CYMK is an accurate way of representing colour for print format. It works on the basis that inks in the colours Cyan, Magento, Yellow and Black overlap they create a broad spectrum of colours.

In printing presses, rollers of each of these four colours are pressed on top of eachother one after the other at different intensities. These make up the colour document that you eventually see.

The four colours Cyan, Magento, Yellow and Black are also called the 'Process Colours' in printing-jargon.

The conversion rate refers to the number of people who actually buy something from to the number of people who visit your site or click through to your site from a banner advertisement.

In Pay Per Click Advertising, the Cost Per Click is the amount you will actually pay when a customer clicks on your online advertisement. In CPC systems like Google Adwords and Yahoo, you bid your maximum CPC on a keyword and when a customer clicks on your ad, you are charged up to that amount per click - depending on what your competitors are bidding at that time.

The Click-Through-Rate is usually expressed as a percentage. It is the number of clicks on abanner advertisement compared to the number of times the ad was displayed (impressions).