- Personally identifiable information
- Product SKU(s)
- Billing city
- Purchase amount
The Google Analytics terms of service, which all Google Analytics customers must adhere to, prohibit sending personally identifiable information (PII) to Google Analytics. PII includes any data that can be used by Google to reasonably identify an individual, including (but not limited to) names, email addresses, or billing information.
Learn more here: https://support.google.com/analytics/answer/6004245