To ensure compliance with EU data protection legislation when using analytics tools, you should:

Having a clear policy on data usage is essential for ensuring compliance with EU data protection legislation, particularly the General Data Protection Regulation (GDPR). This regulation emphasizes transparency regarding personal data collection and processing. A well-defined policy allows businesses to communicate to users how their data will be collected, stored, managed, and used. This not only builds trust with consumers but also facilitates compliance with legal requirements for informed consent, data subject rights, and data protection impact assessments.

A robust data usage policy outlines the purposes of data collection, details about user consent, and the rights of the individual regarding their personal information. This is critical in fostering a transparent relationship with users, who need to feel confident that their data is handled responsibly and ethically.

The other options do not align with the principles of good data governance and compliance with GDPR. Collecting data without consent disregards individual rights, while installing intrusive cookies may violate user privacy and consent requirements. Additionally, relying solely on anonymous data may not always be sufficient for comprehensive compliance, especially if there are risks of re-identifying individuals or if the data can be linked back to individuals through other available information. Thus, having a clear policy is the most effective approach to navigate these challenges within the legal framework.