All the fuss you need to about online banners/ advertisements!!

Over the past few years, most of us have heard about all the money being made on the Internet. Many a people make money through their websites and some of through their blogs. How exactly does this advertisement things work for the blogger or the site owner, ever wondered that?
Earlier HTML(basically a markup language) code instructs a Web server to bring up a particular Web page when a user clicks on a certain piece of text. These HTML code has the added ability to bring a potential customer directly to the advertiser's Web site. Also it can present multiple images, include animation and change appearance in a number of other ways.
The Internet Advertising Bureau(IAB) specifies different banner sizes, according to pixel dimensions. The IAB's standard sizes are:- 

Sizes in bold are part of the IAB's Universal Ad Package.

Name	Width / px	Height / px	Aspect ratio
Rectangles and Pop-Ups
Medium Rectangle	300	250	1.2
Square Pop-Up	250	250	1
Vertical Rectangle	240	400	1.67
Large Rectangle	336	280	1.2
Rectangle	180	150	1.2
3:1 Rectangle	300	100	3
Pop-Under	720	300	2.4
Banners and Buttons
Full banner	468	60	7.8
Half banner	234	60	3.9
Micro bar	88	31	2.84
Button 1	120	90	1.33
Button 2	120	60	2
Vertical banner	120	240	2
Square button	125	125	1
Leaderboard	728	90	8.09
Skyscrapers
Wide skyscraper	160	600	3.75
Skyscraper	120	600	5
Half page ad	300	600	2

As you've probably noticed while surfing the Web, actual graphic content, or creative, varies considerably among banner ads. The simplest banner ads feature only one, static GIF or JPEG image, which is linked to the advertiser's home page. There are several ways a banner ad can be successful some of them are..

Cost per click - The number of visitors who click on the banner ad linking to the advertiser's Web site.

Page views - Advertisers are interested in page views because they indicate the number of visitors who could have seen the banner ad.

Click-through rate - This describes the ratio of page views to clicks.

Different measures are more important to different advertisers, but most advertisers consider all of these elements when judging the effectiveness of a banner ad.

Now a days advertisement can also be done through using Google - AdSense. Here  Google uses its Internet search technology to serve advertisements based on website content, the user's geographical location, and other factors. For more technical information on it info follow the link below

http://en.wikipedia.org/wiki/AdSense