This is what the security guard at the mall is doing, even if he looks like he's just scrolling on his phone. It's what your overprotective jowa does when you go out with friends. "Sino kasama mo? Saan kayo pupunta? Anong oras uwi mo?" That's a form of "pagtatanod." It's the continuous action of watching over something or someone. Parang CCTV na may feelings.