Preparatory visits are

Visits to the country of the receiving organisation prior to the start of mobility activities to prepare and ensure high quality of those activities. Examples include tasks to facilitate administrative arrangements and build trust and understanding between organisations involved. 

Source: Erasmus+ Programme Guide 2023 (Version 3, 04.04.23), Glossary of terms

In beneficiary projects, information regarding preparatory visits, where applicable, can be provided. Depending on the action type of the project, preparatory visits can be added from the Preparatory visits section, Activities section and/or Mobility Activities section of the project in Beneficiary module.