Websites and blogs are proven to be very effective in communicating one’s message to the rest of the world. But more than just sharing important and useful information with other, they can also bring you extra income. How? Through the use of Google Adsense.
AdSense is an application started by Google that allows publishers and authors to post advertisements on their sites relevant to their content. To benefit from this program, one only needs to register his details after which advertisements that show text, images and even videos will start displaying on your website, blog or web page.

The Google AdSense concept makes use of the pay per click or pay per impression system to allow people to earn money. In other words, one earns a certain percentage of commission whenever an ad displayed on his site is clicked by a visitor.
This program is particularly helpful to small and startup websites most of which do business online. In fact, this year 2009 Google AdSense committed to providing new features for its users including allowing multiple networks to display advertisements.
Compared to the banner ads, AdSense ads are non-intrusive because they are normally properly placed on a site or blog. On blogs, for example, the author can even decide which area of his page to position the ads such that they don’t compete head on with the information he or she is sharing with his followers.

Various types of AdSense ads can be utilized today depending on one’s purpose on the internet. The original is known as AdSense for content and this is what’s used on websites, blogs and article submission directories.
AdSense for feeds started in 2005 and is meant for use on RSS and Atom feeds with more than 100 active subscribers. There’s also one for search which allows owners of website to include a Google search box on their websites and another one for mobile content which enables publishers to earn an income from their mobile websites through the use of targeted Google ads.

AdSense for domains, as its name suggests, is used for domain names that have not been developed or are not currently active. And then there’s another one for video which enables publishers that display video content to generate income through Google’s advertising network.
Google AdSense, however, has come up with stringent rules for users in order for them to gain from the program. Due to the so-called click fraud, the program has pointed out that only legitimate clicks on ads posted on websites can be considered to earn commission. Even advertising companies are not exempted from this. This new ruling resulted from the fact that some people intentionally click AdSense ads just for the sole purpose of generating points and earning an income when they’re not actually interested in any way on what the ad is offering. 
On the whole, Google AdSense does not only help website and blog owners earn money because it also improves the content of their sites by posting only relevant advertisements that are of interest to your regular readers and new  visitors.

You have to submit an application into Google AdSense by completing an online form. After the application is approved, you will be capable to participate. You then have to copy and paste a HTML code that is provided by Google AdSense into your web pages. The code produces appropriate ads relevant to the content of the web page. When a surfer clicks on it Google pays you.

Any person who has a website be able to join the Adsense program but not websites with illegal for AdSense content: adult and hate sites. You have to comply with Google's AdSense program policies. It is Free to join. Google has a massive advertiser base and they have ads. For more detail go to: https://www.google.com/adsense/.

Google AdSense can be used in lots of different languages. It is also targeted geographically and hence Global business can take advantage of this and webmasters. Living in almost any part of the world can participate.

Below, there are some tips for beginners:
1. Use the proper framework for AdSense. Google AdSense offers you the ability to change the appearance of your AdSense display. It has been shown that AdSense without a framework bring more clicks than AdSense with a frame.
2. Setting the text color and the color of the hyperlink AdSense ads The case is similar with the color of the text and the link color.
3. Properly configured and deployed, it is with this format on a homepage that you will see the greatest results. Most people don't filter this out and recognize this as advertising. With great certainty a less efficient AdSense format is the banner 468 x 60!!
4. Where should the AdSense units to be placed? The best so that the text will flow around the AdSense and thus creates a visual layout, as would the AdSense for content on your web site belongs.
5. If there are certain keywords you wish to target, make sure the word you wish to target is present in the title, in the first paragraphs as well as in the name of the file. While you're at it you might want to ensure the word springs up in the page's last paragraphs.