Because the activation is already embedded, you never need to worry about Microsoft’s servers rejecting your key. This is especially useful for legacy systems, air-gapped PCs, or users in regions with unreliable internet.
: Originally, a single-user Home and Student license was roughly $89, providing a perpetual license that avoided the recurring costs now common with Microsoft 365 . The "Pre-Activated" Factor & Security Microsoft OFFICE 2011-12 Pre-Activated