Compact Body Compact body of Olympus TG-5 makes it much easier to carry it with you all day.
250g This camera is so light that you can comfortably carry it around all day.
Environmental Sealings For a camera that you carry everywhere with you, being weather proofed is a big advantage. You will have one less thing to worry about.
RAW shooting capability RAW files contains much more color information compared to JPEGs, and gives you more room for post processing without significant quality loss. They provide wider dynamic range and option to recover shadow and highlight clipping to some degree.
4.0X Optical Zoom A Lens with a higher zoom ratio would make it more practical as a carry everywhere camera.
Small 1/2.3 sensor Olympus TG-5's small sensor struggles in low light situations compared to larger sensor.