How can I share my set-up for approval?

Once you created campaign and saved at least one line item (even in draft mode), you will be able to share your set-up with anyone using the sharing feature. Situated on the top right of the campaign page, the "share" button will allow you to copy an URL to be shared with your team. 

The shared page is in read-only mode, but allow anyone with the link to review the selected screens, the available impressions and the campaign dates, with a break-down by line item.

Insights are also available using the "Insight view" button next to the title "Line Item".