Re: What does the numbers means in terms of search volumes?[ Edited ]
June 2014 - last edited June 2014
It's Volume. Such as historical search data of the keywords in Exact match.
For example with searching "Adwords Services NY" it showing number 990(Assume) then 990 people (The average number of times people have searched for the exact keyword based on the location and Search Network targeting that you've selected. We average the number of searches for the term over a 12-month period.)
You learn more thing with Keyword Planner from here.