What is Adsense?

Google runs this ad service that allows website owners to
gain revenue by displaying ads on their websites. Google provides
text, image and video advertisements that appear on participating
websites. These ads appear based on the keywords and content
present on the website.
AdSense has become one of the most popular methods to gain
revenue from a website through advertising space. AdSense ads are
often considered less intrusive than traditional ads. Since the ads are
served based on the content of the website, the ads are also more
relevant than traditional banners.

Website owners are paid when an Internet user clicks on an ad on
their web page. Depending on the ad, the revenue may be a few
cents up to several dollars per click. The ads used in AdSense are
gathered from participants in Google’s AdWords advertising program.

Since participants are paid regardless of whether anything is
purchased at the advertiser’s site, it may be tempting for them to click
on all of the ads on his or her own site. However, Google watches for
this type of activity, which is called “click fraud.” If a web page is
showing signs of click fraud, a participant may lose their access to
Google AdSense permanently.

Website owners can discreetly encourage clicks on their website by
using three main techniques:

• They can use a wide range of traffic generating techniques to get
  more visits to their website.
• They can add valuable content to their site, to attract AdSense ads
  that pay higher per click.
• They use copy on their website to encourage visitors to click on the
  ads. Some of the most common phrases are “Sponsored Links” and
  “Advertisements.” It is against Google AdSense policy to post
  statements like “Please click on my AdSense links.”

Adsense can be a good way to earn extra income from your site.