For overall Banner Statistics
Google Sheet
https://docs.google.com/spreadsheets/d/1wUoVQcXfEdl_fhHlHKf0xViYpSfhYjm_/edit?pli=1&gid=1726691324#gid=1726691324
1. Go to Google Ad Manager and klick on Berichterstellung, then Berichte
2. Click on the Website you would like to know the statistics for
3. Pick a time frame (always full month) and create statistic
I always click "Speichern und erstellen" so I have the latest month already saved.
4. Enter Impressions and clicks in Google Sheet
Single Banner Statistic
If customers would like to know their impressions, klicks and CTR
1. Go to Google Ad Manager
Either use the search funktion and look by customer number or pick the booking by going to "Alle Werbebuchungen"
2. Click on a Werbebuchung and there you can find the Impressionen, Klicks and CTR.
If the customer has alternating banners running at the same time: click on creatives and then you will see how many impressions each banner had.