The General Data Protection Regulation (GDPR) is a set of regulations that standardize data protection laws across all 28 European Union countries. These regulations impose strict rules on the control and processing of personally identifiable information (PII). As of May 25, 2018, all websites that collect data from EU citizens must comply with the requirements of the GDPR.
For a demonstration of how to ensure GDPR compliance on WordPress websites, you can visit: https://codecanyon.net/item/ultimate-gdpr-compliance-toolkit-for-wordpress/21704224.