Used when someone remains undisturbed or undistracted by events around them. Despite the loud party next door, he went about his business undisturbed.
Pro Tip 2/3
Emphasizing Routine
Highlights the continuation of regular, planned activities, despite interruptions. After the false alarm, everyone was advised to go about their business as usual.
Pro Tip 3/3
Ignoring Distractions
Advises focusing on one's actions without allowing disruptions to interfere. The construction was loud, but we were told to just go about our business.