AdSense

BitDefender antivirus analysts detected a new trojan, which hijacks Google text advertisements, replacing them with ads from a different provider.

The threat, which is identified by BitDefender as Trojan.Qhost.WU, modifies the infected computers' Hosts file (a local storage for domain name / IP address mappings, which is consulted before domain name servers and is considered authoritative).

The modified file contains a line redirecting the host "page2.googlesyndication.com" which should point to an IP of the form 6x.xxx.xxx.xxx to a different address, of the form 9x.xxx.xxx.xxx, so that the infected machines' browsers read ads from server at the replacement address rather than from Google.

"This damages both users (because the advertisements and/or the linked sites may contain malicious code - a very likely situation, given that they are promoted using malware in the first place) and webmasters (because it takes away viewers and thus a possible money source from their Web sites)" declared virus analyst Attila-Mihaly Balazs for BitDefender. Users are advised to let BitDefender software delete the trojan.

Publishers of Web sites designed for viewing on mobile phones now have the option to make some money through Google's AdSense program.
Google on Tuesday announced the availability of AdSense for Mobile, its service for placing contextual ads with mobile Web content.

"We've just launched AdSense for Mobile, which can help you expand your online content to new platforms," said Alex Kenin, AdSense product marketing manager, in a blog post. "If you have a Web site optimized for mobile browsers, or are interested in creating one, you can start monetizing your mobile site by accessing a growing number of our mobile advertisers."

Here is the list of AdSense related terms that you should know for sure:

Page impression: A page impression is generally the same as a page view but the number of page impressions can sometimes be different than the page views. This happens when the page is viewed by a visitor but the AdSense code is not executed for some reason (which means that the Ads are not displayed to the visitor).

Ad unit impressions: Whenever you get page impressions, you also get Ad unit impressions. However, the ad unit impressions are dependent on the number of ad units you have on your page i.e. number of ad units that get executed when the page loads on user’s browser. Note that the link unit impressions are also counted as ad unit impressions.