What is Enterprise Content Management (ECM)?

Many people define ECM in different ways like storing, retrieving and organizing the documents in a strategic way, Below are the few definitions I think which are very near to meaning of what is ECM? Definition by AIIM: Enterprise Content Management (ECM) is the strategies, methods and tools used to capture, manage, store, preserve, and deliver content and documents related to organizational processes. ECM tools and strategies allow the management of an organization’s unstructured information, [...]