Context is something that's often forgotten on resumes. Context, in my view, can be defined as "additional information that provides for a more complete understanding on the part of the reader." (Not sure if that's the real definition or not, but I'm using it.)
I see bullets all the time that say things like "Won the top sales award." Adding context transforms that vague statement into something like "Awarded for the highest sales results vs. plan in the entire 110-store region in 20XX and 20XX."
The reader now knows what the award was for, when you won it, and how many others you beat out for it, which can make the achievement much more compelling.
Hope that helps!
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