Meta Distribution
Meta Distribution There are three classifications of distribution of your web content: Global (the entire web), Local (reserved for the local IP block of your site), and IU (Intern
From: Meta Tags Explained
Meta Distribution There are three classifications of distribution of your web content: Global (the entire web), Local (reserved for the local IP block of your site), and IU (Internal Use, not for public distribution).
Example:
<meta name="Distribution" content="Global">Recommendation: Optional, but we highly recommend not using it. If you want to restrict distribution, use the robots.txt tag or your HTAccess file.