The idiomatic expression "to keep focused" means to maintain concentration and stay on task, despite any distractions or obstacles that may arise. Full definition
Before the dust gets thrown in the air, it helps keep me focused on what I need to accomplish for the week. (entrepreneur.com)
It will make everything run a whole lot smoother and help keep you focused on where your career is going. (remonline.com)
Using the compare / contrast technique helps students identify personal safety issues while keeping the focus on what «to» do rather than what «not» to do. (bridge3resources.com)