what kind of info would you like?
most info is available on the web.
Basically seizures itself can be harmful when it is for an extended time, status epilepticus, which can cause some damage. ALS care is needed to stop the seizure.
then there are the tonic clonic (Grand Mal) Seizures. and the Myoclonic ones.
In general Seizures are not so significant unless they occur more than once.
This is from my memory, I am no Doctor.