To get an idea of whether you should continue to run a Search Network campaign on search partner sites, you can:

July 4, 2019 Certificate Land

evaluate the campaign’s performance on search partner sites vs. display partner sites
segment the campaign’s data by network and evaluate its performance on search partner sites
use Keyword Planner to evaluate how the campaign might perform better on search partner sites
review the Overviews page to see the top searches on Google.com that caused your ads to display

The correct answer is:

segment the campaign’s data by network and evaluate its performance on search partner sites.