What are the importance of presenting data in graphical form?

What are the importance of presenting data in graphical form ? Which value is key to the graphical prsentation of data ?

Graphs are a attractive way of presenting the information and it is easy to understand. The values of accuracy of data used and coverage of full data is very important for graphical presentation of data. If it is prepared by wrong data then it will lead to wrong decision making by the top management.