What purpose does it really serves to burn for eternity?
Our prisons serves to correct wrong doers, when the wrong doer is beyond correction we put the wrong doer in a mental facility.
We might put people in prisons for the rest of their life for certain serious offenses but that also is limited to their life time.
Essentially our prison systems serves as a protection to the remaining good masses.
Now to the question asked on the first line what purpose does it really serve to burn forever does it serves as a means of correction? or does it serves as a means of protection? If correction how does or has burning forever corrected anyone? If protection, protection from who.

If there is any other explanation am all ears.

This thread is dead on arrival. All them religious peeps stay away from these sort of questions. Its totally beyond their imagination.

Apparently Kumuyi believes hell fire is real. What a nut head.

It's purpose is to scare simpletons into obedience?

It serves it's purpose mainly as a deterrent. Once the day of reckoning arrives and thereafter it becomes the most pointless idea ever thought up.