Hi,
These criteria correspond to the Remarketing feature recently
introduced in AdWords:
http://adwords.google.com/support/aw/bin/answer.py?hl=en&answer=173945
At this time it isn't possible to correlate these rows to the
corresponding audiences in the AdWords web interface, so they aren't
terribly useful. If you are only trying to evaluate the performance
of your keywords and placements then these rows can be ignored, as
they are neither.
Best,
- Eric Koleda, AdWords API Team