The era of big data has been changing corporate systems. First is the influx of data from systems like CRM and others. The advent of data availability from social media is greatly increasing the flow of big data. In this there is much opportunity.
The issue is that the data is very large in volume and usually too large to place in a data base or to download. Also, much of it is unstructured data that is difficult to analyze.
Hadoop is a technology that enables distributed storage of data and distributed analysis on an efficient basis. It enables the data to be analyzed without downloading it, which is a major advantage. It also is increasingly being tied into various data analytics tools that can deal with vast quantities of unstructured data and perform predictive analysis.
With the opportunities beginning to be realized, a new vigour is being added to decision making. For more, check out this link.