Merging records is carried out when you find duplicate data stored on the system or when there are two or more bibliographic records for the same work. Let's see an example. Here there are two bibliographic records for the same manifestation.
We want to merge the holdings for the first record with the second record.
Any reservation or orders for the first record are merged with the second one.
In the Cataloguing general parameters you can specify whether to merge only the holdings in the current institution or in all institutions.