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Ev Williams on metrics in media: 
Advertisers don’t really want your time — they want to make an impression on your mind, consciously or subconsciously (and, ultimately, your money).
As the writer of this piece, I don’t really want your time — I want to make an impression on how you think. If my rhetorical skills let me do that in less time (for me and you), all the better.
At Medium, we don’t really want anyone’s time. We want to create a platform that enables people to make an impression on others. To make them think. To change their minds. To teach them something or connect emotionally. It’s hard to measure any of that.
Number of families seen, number of disabled people given something, no. of notifications for a child…all of these are one dimensional metrics that are measured.
Is the families life better? Are children happier? Does a disabled person see a better future for themselves? Harder to measure, for sure. More important, ofcourse.
There is a clear need to think about why we do what we do, what outcome do we want and what measures are worth understanding for that.