A tag or word cloud is a collection of tags or words (or both) that are most commonly used in a speech, on a blog, in an article, etc. Below is a current word cloud for my blog. It refreshes automatically twice a day; so, it will change as the content of my blog changes. If you click on an word in the cloud, you should be taken to the Google search results for that word.
The tag cloud in my sidebar is different. It is restricted to tags only and not all of the words on my blog. Clicking on a word in the tag cloud in the sidebar of my blog will take you to all of the posts that use that tag.
The larger the word, the more often it appears on my blog at that moment.
This tag cloud is provided by Tagul.