What are the best practices of using insert option in Salesforce trigger?

Hi Pranav,

The Best Practices of using insert option in trigger are

Before Insert:-

1) We can use this during change fields using trigger.new

2)You cannot update or delete original object using an update or delete DML operation because the original object has not been created; nothing can reference it, so nothing can update it.

After Insert:-

1) We cannot use  change fields using trigger.new because  a runtime error is thrown, as trigger.new is already saved.

2)We can use after insert during update or delete original object using an update or delete DML operation. But in case of delete it is not necessary to use because the object is deleted immediately after being inserted.