These days, virtually every business is afraid of having a data breach, and for good reason. There are so many breaches happening with so many businesses from large to small that it's a necessary worry. To be more secure, it's important to know what a data breach is and how they can happen to a company's computer network.
In most data breaches, the intent is to steal some of the data held by the company and to use it by either selling it or using it to take out credit cards or to buy products. It can be difficult to know whether the data has actually been stolen during an attack on a network, though. In general, if there has been a cyber attack that has made private data able to be viewed by the hacker, it's assumed that the hacker did something to take some of that data. It could be taking screenshots, copying and pasting it elsewhere, downloading it to a thumb drive or even posting the information somewhere public so that others can steal it.