Google's main source of data for user metrics is obvious, and I don't understand why people on this forum keep ignoring it. It's the Chrome browser. It has tens of millions of regular users, easily enough to allow it to collect statistically-significant data. Unlike Analytics, it can collect user metrics for ANY SITE. I'M NOT TALKING ABOUT BOUNCE RATE! Instead, I'm talking about truly useful metrics such as:
-- A user bookmarks a page as a favorite
-- A user saves a page on their hard drive
-- A user prints out a copy of a page
-- A user returns to the page later
-- A user visits other pages on the same site
I don't understand why people keep talking about bounce rate when these other signals are obviously much more reliable.