Here's what you need to know about GDPR in a compact form:

Purpose: GDPR aims to protect the privacy and personal data of EU citizens by regulating how organizations collect, process, store, and transfer personal data.

Scope: GDPR applies to all organizations, regardless of their location, that process personal data of individuals within the EU, including businesses, nonprofits, and government entities.

Key Principles:

Lawfulness, Fairness, and Transparency: Data processing must have a lawful basis, be transparent, and fair to individuals.
Purpose Limitation: Data should be collected for specified, explicit, and legitimate purposes.
Data Minimization: Collect only necessary data for the intended purpose.
Accuracy: Keep data accurate and up-to-date.
Storage Limitation: Retain data only as long as necessary.
Integrity and Confidentiality: Implement security measures to protect data.
Accountability: Organizations must demonstrate compliance and have a Data Protection Officer (DPO) in some cases.
Consent: Obtaining clear and unambiguous consent is crucial for data processing. Individuals have the right to withdraw consent at any time.

Data Subject Rights: GDPR grants individuals several rights, including the right to access, rectify, erase, and restrict the processing of their data, as well as the right to data portability and the right to object to automated decision-making.

Data Protection Impact Assessments (DPIAs): Organizations may need to conduct DPIAs to assess and mitigate data protection risks for high-risk data processing activities.

Data Transfers: If data is transferred outside the EU, organizations must ensure an adequate level of data protection. Mechanisms like Standard Contractual Clauses and Privacy Shield (now invalidated) were previously used.

Data Breach Notification: Organizations must report data breaches to the relevant authorities within 72 hours of becoming aware of them, and in some cases, notify affected individuals.

Penalties: GDPR imposes hefty fines for non-compliance, with fines of up to €20 million or 4% of global annual turnover, whichever is higher.

One-Stop-Shop: Organizations dealing with data in multiple EU member states can usually interact with a single supervisory authority, known as the "one-stop-shop."

International Impact: GDPR has influenced data protection regulations worldwide, as many countries have updated their laws to align with GDPR principles.

Ongoing Compliance: GDPR compliance is an ongoing process that requires continuous monitoring, updates to data protection policies, and regular training of staff.

Complying with GDPR is essential for organizations handling EU citizen data to avoid severe penalties and maintain trust with their customers. Consulting legal experts and data protection authorities for specific guidance is advisable.