Word Cloud

I think the word cloud is a very effective visualization. It counts up the number of times each word occurs in the input document and adjusts the sizes of the words appear in the word cloud. By looking at this visualization, we can notice right away that the word "data" occurs most frequent. The size of that word is very standing out among other words and it instantaneously captures the viewer's attention. It serves the purpose to easily see which words have the highest frequency.