Data Visualization helps in transforming a contextual data in to a visualisation, for easier understanding and deriving better insights. The main idea is to identify patterns, trends or outliers present in teh data and get a better understanding on the type of data or output we get.
Generally data visualizations are carried over for breaking down a complex algorithm into easier ones, to extract interpretations and take cations accordingly. There are diffrent types of data visualiztions that can be done, based on the requirement. It also helps creating an easier distributions of the data, that gives rise to increased oppurtunities of identifying a hidden pattern and taking faster deciisons. Thus, with the presence of Big Data and complex algorithms and models, visualization are the only tools that helps breaking down the complexity.