Being one of the major search engines of the Russian, Belarusian and Kazakh segment of Internet and having good positions in Ukraine, Yandex offers a powerful pool of space for advertising. This includes banner and contextual advertising.

We will now focus on the illegal use of the mechanism of «pay-per-click», which allows advertisers to pay only for the ads that are clicked.This tool provides inflow of the target audience - people who are really interested in the goods, services or information contained in the ad.

Yandex Direct is the name of the search engines contextual advertising system, which is developed on the basis of displaying ads to those webserfers who are looking for certain things or information contextually similar to the promotional items. But money always cause cheating and in our case, the most dangerous and unpleasant thing could be Yandex Direkts click-fraud.

At the same time, Yandex Direct click-fraud protection is as well organized as Googles AdWords’ ont. Russian specialists have developed tracking algorithms and algorithms of automatic click-fraud elimination, which are based on more than 20 various parameters. The effectiveness of these algorithms can easily be verified by comparison of behavioral factors (accounting entry points to the site) and budget expenditure statistics. Fee for invalid clicks are returned back to the advertiser's account immediately after determining their fraudulent nature

WebVisor is another powerful tool to fight Direct's click-fraud. WebVisor's code can be placed on any page, and then SEO-specialist can manually track the unwanted clickers adding them to the “black” list.