The Vocabulary browser is accessible from the Utilities main menu. This shows all controlled vocabularies registered in openBIS and the terms they contain. Vocabularies are predefined lists of values to choose from in given fields. Vocabularies can be created/modified by an openBIS Instance admin (see New Entity Type Registration).
This information is needed for filling the forms for Batch Upload orBatch Update of Objects via TSV file. If an Object has a property of type Controlled Vocabulary, the codes of the vocabulary have to be entered in the .tsv template file. This is not the case for XLS Batch registration or update, where labels can be used.