Site Authentication

Whenever someone asks me about using AdSense on password protected pages I always say it's a bad idea. The reason for this is that only certain individuals will see those particular ads, meaning they'll be displayed to the same people over and over again. This increases the likelihood that the same few people will click the same few ads, which could cause problems with Google suspecting foul play.

Another problem with hiding your ads behind password protection is that the AdSense crawler can't read the page content correctly and consequently the ads are often poorly targeted. To get around this problem Google has just unveiled AdSense Site Authentication. Basically this allows publishers to provide AdSense with password information so that the crawler can 'unlock' protected pages and crawl the content effectively. To get the ball rolling just log in to your AdSense account, click on the 'AdSense Setup' tab and then the 'Site Authentication' link.

Read more about Site Authentication at Inside AdSense.

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