the word cloud is a visualisation that was initially used to display how frequently words appear in a given body of text by drawing each word with a size that is proportional to its frequency. Later, it was expanded to display words with a size proportional to any value provided, not necessarily the frequency of the word. For example, we could have a Country Name/Country Population word cloud.

In the following example, we can see the visualizations of the word cloud (all of the words are nearly the same size, since their usage is the same in the query results):