On your dashboard you may notice conversions in parenthesis like below:
These conversions are considered 'overlaps' and have touched more than one ad on the path to conversion.
You can expand these by clicking the blue number of overlaps.
One thing to note is that the overlap simply indicates that there was another filter touch on the path to conversion, it does not necessarily mean that filter should get credit.
Credit is determined by a number of factors including your model, attribution type, date range, and settings.
If you have any questions about this please feel free to reach out to email@example.com