It can be awkward taking photos and having to keep putting your camera in and out of its case or bag. It can also be aggravating to just carry the camera around with the fear of dropping it or leaving it on the bus. If you are a forgetful person or would just like an easy way to take your photos you should attach your camera to a strap. You can then place the camera and strap over your neck or around your wrist so you always know where it is. This is especially useful if you are on holiday and taking photos quite frequently. This way you can wear the camera for the afternoon and be ready to take your shots without having to get it out of its bag every five minutes.
Make sure your strap is comfortable, strong and durable and is attached properly to your camera. A strap doesn't guarantee that you aren't going to drop the camera as they can come loose or break. Never pull the camera strap or swing it while your camera is attached.