To access the Campaign report, click the name of a published campaign. There are several configuration options at the top of the report. First, choose a Live view or select a date window. Next, configure the report to choose which sections are visible. 
Views: The total number of ads shown in the campaign
Clicks: The total number of clicks
Reach: The total number of unique active people
Unique Clicks: The number of unique people who clicked
Spend: Current spend total (updated daily, not real time)
CPM: Average cost for every 1,000 impressions (Cost Per Mille)
Note, your campaign spend is based on impressions
CPC: Average cost per click
CPA: Average cost per activity (sometimes called cost per acquisition). This will only appear if you set a conversion Goal.
Activity Breakdown: This section displays the top 10 domains where ads are being seen. Note, mobile apps will appear as a string of numbers
Creatives Table: Summary of Views (impressions), clicks, and CTR (Click Through Rate as a percentage)