A WebmasterWorld thread has discussion around one advertiser noticing Google displaying three scores directly under a Google Netherlands ad. Here is a picture of the ad with the scores underneath the ad:

So I began to do some research and it seems someone else saw the score for a different search today as well, on Google.de. Here is a screen capture, but even though the webmaster highlighted the score with the middle ad, I have a feeling the score is associated with the top ad:

Here is another:

So what does the scores mean?
– Pscore: 0.00101
– mCPC: 10.0000
– thresh: 0.0001

mCPC, seems logical, the minimum cost-per-click for the ad is $10? The Pscore and thresh, I am not sure about.

It seems like many folks are spotting this in Google’s international search engines.

We have forum discussion at WebmasterWorld and at Abakus German Forum.