The buttons and menus at the top of the Gmail inbox have been updated to make working with labels easier. "Move to" applies a new label, archives the message from your inbox and removes any existing labels, similar to working with folders. "Labels" just applies a new label to the message.

Editions included:
Standard, Premier, Education and Partner Editions

Languages included:
US English

How to access what's new:
Sign in to Gmail, select the message you want to label, and click the "Move to" or "Labels" button to choose a label.

For more information:
http://googleenterprise.blogspot.com/2009/02/folders-and-labels-best-of-both-worlds.html

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