What restrictions are there on the gathering and use of consumer data? Summarize restrictions in major markets such as:

C. The regulatory environment
a. What restrictions are there on the gathering and use of consumer data? Summarize restrictions in major markets such as:
GDPR General Data Protection Regulation in Europe
The regulator environment is a lengthy, complex and detailed subject on its own and a very detailed analysis is thus not expected here. Provide a high-level view with a summary table to show what the main areas are that are covered by the regulator the regimes as mentioned and the major differences among them.
Describe the current state of consumer data protection and privacy in the US [not just California].