focus
/ˈfō-kəs/
noun
a center of activity, attraction, or attention
a point of concentration
directed attention : emphasis
the focus of the meeting was drug abuse
verb
to cause to be concentrated
to adjust the focus of (the eye, a lens, etc.)
to bring into focus
focused their attention on the most urgent problems
noun
a small group of people whose response to something (such as a new product or a politician's image) is studied to determine the response that can be expected from a larger population