So you are wondering why your display ad impressions have suddenly plummeted?
As of July 1st 2016 Flash ads can not be uploaded into Google AdWords. Their migration to HTML 5 is also inline with Google’s decisions not to phase out flash on Google Chrome by the end of 2016. Currently these ads are also not being shown if your version of flash is out of date.
Time to update your Flash ads to HTML5.
Starting in Jan 2017, AdWords will stop running display ads in the Flash format altogether. So stop investing in your flash ads as they’ll simply stop showing.
If you use Flash ads in your AdWords campaigns, you can still use the previously uploaded ads till the end of the year.