https://www.cnet.com/news/google-to-acknowledge-privacy-mistakes-to-senate-panel/

The written testimony didn't specify which mistakes the company would acknowledge. In July, Google drew criticism when a report revealed that third-party applications had been letting their employees view Gmail users' messages. And in August, reports surfaced that some Google services on Android and Apple devices track users' location even when location services are turned off. These are the most recent privacy concerns raised by critics, but a Wikipedia page dedicated to "Privacy concerns regarding Google" lists more.

Wednesday's hearing, which will focus on technology companies' and internet service providers' approaches to protecting user privacy, will also include executives from Apple, Amazon, AT&T and Twitter.