A: it can boost alertness and promote mental clarity. In fact, recent research shows that caffeine increases your focus and reaction time. 

Caffeine has been shown to improve cognitive function when consumed in moderate amounts. In one study, research participants who consumed caffeine scored significantly higher on short-term memory tests than those who didn't.

Even if you aren't taking a test, it can help your brain focus on its current task. It's like being able to multi-task—you can be actively thinking about work while also focusing on an unrelated task like driving or talking with coworkers.

It may sound counter-intuitive but it comes down to attention span—caffeine helps you focus on what's important without getting distracted by other stimuli around you.

Read more about the benefits of Caffeine and Drinking Coffee here.