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Preventing leaky filters is not as good as suggested

Posted on: Tháng Ba 30, 2008

Many of you have tried Competitive Ad Filters in your adsense account to remove all low-pay ads in the hope that your monthly earnings will be increased. Google is also supportive of this option but it seems that this function has decreased revenue of most of publishers who have tested it including me.

The ads filter has reduced eCPM of my blogs and sometimes I still saw the filtered ads still appearing on my blogs. Why did I know? I used the Adsense Preview Tools suggested by Google to do so and I am sure that clicks from these ads would never be recorded too.

Here are 5 easy steps on how to set up Competitive Ad Filters:

  1. To edit your competitive ad filter, log in to your AdSense account at
  2. Click the AdSense Setup tab. A row of links will appear beneath the tabs -­ click Competitive Ad Filter. This page will display the URLs currently being filtered for your account. If this is the first time you’ve used your filter, the text box will be empty.
  3. Choose the appropriate product sub-tab and click Add / Edit Sites.
  4. Copy the URL from the ad into your filter list. There are a couple of ways to find this URL – both methods are described in detail below.
  5. Click Save Changes to add these sites to your competitive ad filter. It usually takes about 4 hours for your changes to take effect, so you’ll continue to see ads for these sites on your pages for a little while. If filtered ads are still appearing after 48 hours, please contact us.

Before doing this, Google also recommended publishers considering these 3 essential optimization tips about Competitive Ad Filters as follows:

Tip 1: Don’t use “www” in your Ad Filters

Ads should be blocked at the domain level. Frequently, publishers append “www” to their filters, such as using ‘’ instead of ‘’. If you filter ‘’ and the ad points to, the ad will continue to appear on your page. However, filtering ‘’ will block ads from ‘’, ‘’, and ‘’.

Tip 2: Don’t believe the myth about blocking ‘low-paying advertisers’

Our auction system automatically selects the best performing ads for each page to help you earn the most possible money. This is especially true with our new expanded text ads. By filtering ads you think are low paying, you could actually be cutting out the most optimized ads and decreasing your revenue potential. Each ad that is filtered is one less bid in the auction, lowering the price for the winning ad on your site. You benefit most when there is a larger pool of advertisers competing for a place on your site. Additionally, when we calculate the auction, we take ad clickthrough rates (CTR) into account – an ad with a $0.25 cost-per-click (CPC) with a 5% CTR is more valuable than an ad with a $1.00 CPC but a 0.1% CTR.

Learn more about how the auction works.

Tip 3: Don’t go overboard with filters

Only filter URLs when absolutely necessary. As mentioned, each URL you add to your filter list may cut into your AdSense revenue potential, so it’s important to think carefully before deciding what to block.

If you are worried about the ad inventory available for your blogs after using the Competitive Ad Filters function, I would say that YOU SHOULD TEST IT FOR CURTAIN TIME and decide whether you will continue or not. Hope my post can help you some.


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