Privacy & Tech

How can websites minimise the personal data they collect?

Websites can minimise the personal data they collect by asking only for the details needed to provide a service or complete a specific task. For example, a newsletter sign-up usually needs an email address, but not a home address or date of birth. The same principle applies to information collected automatically through analytics tools, logs and third-party integrations: each piece of data should serve a clear, necessary purpose.

Website area	Example of minimisation
Forms	Remove fields without a clear operational need.
Analytics	Collect relevant events instead of every available interaction.
URLs and logs	Avoid including unnecessary personal details.
Integrations	Disable data fields and sharing options that are not needed.

The ICO’s data minimisation guidance explains that information must be adequate, relevant and limited to what is necessary.

Minimisation can also involve reducing the precision of collected information when a less detailed value is sufficient for the purpose. For example, a website might use an approximate location instead of precise coordinates.

Minimisation is an ongoing decision. Review collection when a feature changes or its original purpose ends. Analytics data retention addresses the related question of how long information should remain available after collection.