Again, at the BrightonSEO conference conference, John Mueller was asked about how do they know if they are doing a good job with making publishers happy. Do they have metrics to determine if they are doing a good job. John Mueller said they do look to make publishers happy but the metrics behind that are complicated.

John said:

So Google does use different metrics to try to determine the health and happiness of the ecosystem but said there is no magic metric that Google can point out to determine this.

Here is the video embed when John said this at the 3 hour and 19 mark:

Forum discussion at YouTube.