Usage patterns
〈人〉に助けを求めるto ask someone for help
He asked his neighbor for help.
助けが必要だto need help
This task needs everyone's help.
〈人〉の助けでwith someone's help
With a friend's help, I found a new job.
助けに入るto step in to help
When the fight started, he stepped in to help.
Expressions
助けになるbe helpful; come in handy; be of use