The online business has grown dramatically in the last decade due to its inherent virtues. Since the advent of internet and the resultant intense traffic on the information superhighway, online business or e-commerce unveiled a completely new horizon in the commercial sector. Today, products and services are reviewed, ordered, bought, sold and bid online. Promoting a product or service through internet has thus become a very important marketing activity. Traditional business promotion strategies like advertisement and commercials have also undergone a complete facelift through the internet media. Online ad business is now a multi-billion dollar industry. There are hundreds and thousands of web-based advertisement companies devoted to promote their clients? products and services. But the internet giant Google is believed to be the leader in the online ad industry. Google came up with two of its popular ad serving services namely Google AdWords and Google AdSense. Together these programs work as an interface between ad providers and ad publishers with Google being the intermediary. Today there are countless AdSense websites by which Google, ad providers and ad publishers are making direct or indirect profits.

What are AdSense and AdWords anyway? To understand AdSense, we need the understand AdWords. AdWords is a Google service that interested ad providers sign-up with. Google ensures publishing of ads from its AdWords clients on numerous websites. Once there is an activity in relation to the ad published, namely a click, search or ad appearance, the client pays Google an agreed amount of money. Google in turn shares this income with the owners of the websites or blogs where the ads appeared and who signed up for such a deal through AdSense program. In simple words then, AdWords clients are ad providers while AdSense clients are ad publishers. Google is the interfacing medium and service provider to both these clients.

For those who want to earn money by a rather easy process, AdSense have been found to be a great online source. If you are an AdSense client, your website draws substantial traffic and your ads are tweaked to automatically lure visitors to click ? you have a high probability in earning handsome revenue.

AdSense serves contextual ads. This means, Google will serve ads that relate to your website/blog's context. It is thus important for your website or blogs to be interesting and attractive with high quality contents. And most important ? people must find a way to your website. This traffic potential is achieved by following good search engine optimization (SEO) techniques. For example, if your blog or website talks mostly about used cars, their availability, price range, advantages/disadvantages, tips and tricks etc. and you have followed an effective SEO technique, there will be lot of visitors at your website/blog who are interested in used cars. They are likely to stay a while at the site reading and seeing its contents. Meanwhile basing on the contents and design Google serves the relevant ads. It is natural for a visitor to click these ads (AdSense for contents) or search further information through a custom search engine provided (AdSense for search). As soon as the visitor makes such a move, you start making money.

To make best use of Google AdSense, it is essential to have a detail idea about the program's basics, do's and don'ts, tips and tricks. To start with you may visit AdSense homepage or numerous AdSense forums and blogs that explain how to get the maximum out of your Google AdSense websites. Alternatively you may read the award winning book of Joel Comm titled ?What Google Never Told You About Making Money with AdSense?.