It comes after a complaint by the Norwegian Consumer Council, which had alleged that users' personal data was being shared unlawfully for marketing purposes.
Euronews explains how internet users' personal data is shared with advertisers and why campaign groups believe they are being exploited
The damages could exceed €10 billion if the legal proceedings are successful, the NGO filing the cases said.
Will the new strategy allow Europe to catch up with the US and China while protecting citizens from the risks of artificial intelligence? Euronews takes a look.