Summary by National Aeronautics and Space Administration (NASA) - Vulnerability Disclosure Program
The robots.txt file is a text file that provides instructions to web crawlers and search engine bots about which parts of the GLOBE website they are allowed or not allowed to access and index.
When the line in robots.txt contains Disallow: /archive/classic/, it indicates that GLOBE is requesting search engine bots not to crawl or index that specific path and its contents. This is a way of asking well-behaved bots to stay away from certain areas of the website.
However, it's important to note that robots.txt is merely a request-based system, not a security measure. The contents of blocked paths should still be accessible directly by users.