A story, by Marissa Mayer (then at Google), about metrics and simplicity:
[...]
I worked my way through the email queue. And then I saw it: The next email had just a number ("37") in the subject - and no message text. What a weird form of spam, I thought. Why would anyone be motivated to just send a number? I searched for the user's email address to see what else had been sent. Interesting. Lots of numbers: 33, 53, and then a clue: "61, getting a bit heavy, aren't we?" Furthermore, the date on each of the messages seemed very familiar. Then I realized that's because the dates were all days that I had launched various changes on the homepage. "Getting a bit heavy?" - that one did correspond to one of the wordiest homepage releases we had ever done. Could the sender be counting words? Sure enough, I looked back, counted the words myself, and he was - a manual, human version of a scale for the Google homepage. He was weighing our homepage and letting us know when it was getting too heavy. One of his earliest mails had a note in the body: "What happened to the days of 13?" - referring to the word count on the initial 1999 homepage.
This mystery and its revelation was really interesting because I thought about the homepage, and how to keep it simple, all the time. Yet I hadn't thought to look at it through this very simple lens: just count the words. The fewer, the better.
[...]
