At the same time it can also be used in numerous other ways to improve the running of a business, by for example getting your staff to work more efficiently and conscientiously as a result of knowing they're being watched, or by allowing you to watch over your business and see how the staff are performing and how your business is operating which can help you to think of good ways to improve your day to day runnings.
However, like any investment, the investment is only going to return if it has been well studied and well thought out. If you were going to invest in stocks and shares for example, then you would research the business you were buying into, the industry, and their competition. In much the same way then you should make sure that you research your CCRTV camera and look at all the possible options.
The fist thing you need to look into is the brand. There are many brands that produce CCTV, and it is important to go for a recognised and well renowned brand such as LG CCTV for instance. This will help you to ensure that your CCTV is from a reliable source and thus that it is less likely to break down. At the same something like an LG CCTV should mean you get better customer support and that the company isn't likely to go out of business any time soon. Search for your make of CCTV on Google - be is LG CCTV or another brand - and see if anyone has left any reviews about particular models etc that can help to guide your decision. However don't lend too much weight to any one positive or negative review, as no matter the quality of the camera there will always be good and bad experiences. Instead try to get a general overview for what people think of the brand and then use this to make your decision.
Similarly you also need to decide on what model of camera you want and how many features you want. This will depend firstly on your budget and you will of course be restricted by how much you are willing to spend on CCTV. At the same time though there is no reason to spend more than necessary for features that you don't need if you only want an arbitrary level of security. The cheapest and simplest to run systems will be the analogue ones that use a VCR recorder in order to record VHS tapes of the footage. However a digital set up will give you a vast range of more flexible options and abilities, allowing you to store footage at different qualities and to also engage things like motion sensors in order to detect movement and start recording only when there is someone or something in the area being watched so as to avoid recording hours of blank footage.
Finally, IP CCTV is a form of CCTV that gives you the ability to place your cameras with no need for wires and this means you can put it in any location. Meanwhile by using this form, you will also be able to transmit the footage wirelessly to be watched while you're at home etc.