Clickthrough, or clickthrough rate (CTR), is the percentage at which viewers click on online ads and go to the advertiser’s site – whether to sign up for something, to make a purchase, or just to find out more.
The clickthrough percentage calculation is arrived at by dividing the gross number of clicks by the gross number of advertising impressions served.
A grayscale image uses only shades of gray to represent an image.
Black-and-white photographs can use a virtually unlimited number of shades of gray, but most computers can display only 16 or 256. To grayscale is to convert a continuous-tone image, like a black-and-white photograph, to an image made up of pixels. Grayscaling is different from dithering, which uses either black or white pixels next to one another to simulate shades of gray. In grayscaling, each individual pixel can be a different shade of gray.
NetCaster was Netscape Communicator’s push delivery system. It was basically a web environment that is always active and can update its onscreen appearance without going to a new URL or reloading. Like all push mechanisms, NetCaster doesn’t require the user to manually check for new content or sit through an update. It let the developer put new content in front of users instead of hoping they come looking for it.
The Netscape Communicator browser ceased development in 2002.
A peer-to-peer (P2P) network is one where each workstation has both server and client capabilities and users can initiate communication between any two (or more) computers. P2P is an alternative to the traditional client-server model of networking, and is especially handy for trading files across the internet. With the advent of file-exchange programs like Napster, peer-to-peer has also come to describe the exchange of files through a mediating server.
The word template comes from a woodworking term meaning a thin sheet of metal with shapes cut out of it as a guide. Similarly, HTML templates are skeletal HTML pages with the main content left out. That way, you can quickly create a series of pages with an identical look or navigational structure but different content. When creating templates, it’s always a good idea to use of a lot of comments (explanatory text within
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) so others will be able to use them without much trouble.