Only after completing the above required items, the campaign can be activated.Once the campaign is activated you can pause the campaign anytime .On the Campaigns page, you can find a list of all the campaigns that have been set up for Ad Account.With the results being plotted for
Engagement Overview(Impressions vs Clicks)
Cost Metrics(CPC and CPM Trends) ,
Efficiency Metrics(CTR and Conversion Rate Trends)