Indoor cameras are meant to be used inside to record any activity in your home. They typically are not weatherproof, so if you place it outside, the camera may get damaged.
Some features you’ll want to take into consideration are night vision, field of view, audio capabilities, pan/zoom/tilt, and video resolution. If your camera doesn’t have night vision it will be useless in the dark, so night vision is a must.
If you have a large room but the field of view is only 45 degrees and there are no pan/zoom/tilt capabilities, you’ll probably need another camera or two to monitor the entire room.
Common places for indoor cameras include living rooms, offices, and garages. They typically don’t record footage 24/7, only when motion is detected.
Many companies have the ability to let you view your camera’s footage through their app so you can check on your home while you're away.
Indoor cameras give you valuable insight into your home. If someone breaks in, a camera can capture footage that you can turn over to the authorities to help catch the culprit. They can also let you check on loved ones at home while you're away, or to just see if everything's fine while you're on vacation. An indoor camera is certainly useful, but it's not necessarily an integral part of the home security system.