what is the difference between ga:visitors & ga:visits in GA API?

Question

I am playing with http://ga-dev-tools.appspot.com/explorer/

While I found that there are ga:visitors & ga:visits.

What does the number mean for each?

Thanks,

Answer 1

ga:visitors means unique visitors (i.e. "cookies" or unique browsers). ga:visits means visits. A visitor may make multiple visits in a date range. Also see this Google Analytics help page.