I am using a custom scoring profile and would like to know what made one document score higher than others for debugging purposes. Is there a special field I can include on the $select or a parameter to pass in to the request? This would help me play around with boosting and weights given my data source
There isn't a way today in Azure Search to get any sort of explanation for how documents are scored, regardless of whether or not the scoring profile is the default one or a custom option. You can vote for that feature here if you think it would be useful. For now, I would just do your best to review our documentation on scoring profiles and continue to tweak your scoring profile until you see the results you expect to.