Many new internet marketers that earn money online through adsense were banned due to invalid clicks or click fraud. So when does a click is considered invalid or fraud? The following section is an excerpt from the Google Adsense blog explaining what are invalid or click fraud.

Invalid clicks are clicks for which we decide not to charge our AdWords advertisers, since they may artificially drive up advertiser cost or publisher revenue. These include extraneous clicks without any value to the advertiser, such as the second click of a double-click. They also include many other types of clicks that we’ve determined aren’t motivated by genuine user interest.

“Invalid clicks” are often confused with “clicking on your own ads”. However, we’d like to stress that invalid clicks are generally any clicks that artificially inflate advertiser cost or publisher revenue, regardless of their source.

Click fraud is a subset of invalid clicks that are generated with malicious or fraudulent intent — in other words, clicks that are intended to drive up advertiser cost or publisher revenue artificially. Sources for these clicks include, but are not limited to:

• A publisher clicking on his own ads, or encouraging clicks on his ads
• Users or family members clicking to support the site / publisher
• Third-party programs with user incentives, such as paid-to-click services and click-exchanges
• Automated clicking tools, robots, or other deceptive software

The same principles above apply to ad impressions and conversions as well. Some sources of invalid impressions include, but are not limited to:

• Excessive page refreshes, generated either manually or automatically
• Third-party programs with user incentives, such as paid-to-surf or auto-surf programs
• Third-party programs for purchasing fixed amounts of traffic, e.g. “$10 for 1,000 page views”

To summarized the article any method that generates artificial traffic or clicks are not considered valid. What are the repercussions? They might ban your website without any warning.

For more information you may want to visit Google Adsense Program Policy.

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James