What is audit info in the campaign detail page?

Audit Info gives you a quick glance about the basic elements in a campaign ,ie, ads, bids and keywords. In other words it gives you information about the percentage of ad groups having ads, keywords and bids. Sometimes the ad groups might not be synced so it might show ad groups with missing elements. For this you can re-sync the data by clicking on "Sync" button beside the campaign name in the detail page itself. 

However if the data still does not reflect, kindly run the audit job for a detailed report. If the campaign is created via AdNabu, the audit job auto fixes the ads, keywords and bids.