You should merge places when possible to ensure that any hidden backend data is not lost. Below is a list of some of the types of imports you may come across.
Waze3rdParty - Gas Station Imports
Imported descriptions can be longer than the max character counts, and editors may truncate descriptions to allow for saving other edits. However, there is no initiative to adjust all Yext descriptions.
WazeParking1 & WazeParking 2 - Parking Lot Imports