Because this is a archive (a compressed format used by 7-Zip ), you should be extremely careful before opening it. Compressed files are a common way to bypass basic email and browser security scans. Before you extract anything:
Be cautious—files with ".7z" extensions from unverified sources can sometimes contain malware or "junk" data meant to lure curious clickers. Security Warning
If you must open it, do so in a "Sandbox" or a virtual machine to keep your main computer safe.
Many older digital courses used humorous or bizarre names (like training rodents) as metaphors for automating small tasks to generate income.