At the moment you can share the white-labeled report with the client via a link.
To do so click on Build report button in the right upper corner of the campaign.
There you can choose which sections you want to include in your report and add comments to those sections:
To finish building your report please click on Share via link button in the right upper corner and copy the link to send it to your clients/colleagues.
Soon we will add an opportunity to export campaign reports in PDF and CSV.