The Serializer version matches the Office version installed (e.g., don't use a 2019 Serializer on a 2021 install).
If you are considering whether this version is "better" than 2021 or 365, here are the key improvements found in Office 2024 LTSC : swdvd5officemacserializer2024mlfx2381811 better
If you want the "better" experience, moving from a static Volume License (like the one tied to x23-81811 ) to a is the primary recommendation. The Serializer version matches the Office version installed