As with organic search results and more recently display ads showing annotations, you will also start to see personal annotations alongside Adwords ads if any of your friends or connections have recomended an ad using the +1 button.
Once your Google+ Page is live and you are linked to Analytics (via webmaster tools or by putting the Analytics snippet on your page), you can activate the social extensions setting by associating ads with your Google+ page. Reporting Segments
The reporting segments mean that you will actually be able to see +1 activity breakdowns at Campaign, Ad group and keyword levels in your Adwords Campaign as follows:
Personal – Someone you are connected to +1’d your Google + Page or landing page
Basic – anonymous +1 information
None – Impressions without any +1’s