> For the complete documentation index, see [llms.txt](https://help.openloyalty.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.openloyalty.io/faq.md).

# FAQ

- [Configuration Migration](https://help.openloyalty.io/faq/configuration-migration.md)
- [Custom Attributes](https://help.openloyalty.io/faq/custom-attributes.md): This article explains what custom attributes are and how they can help you better utilize the platform and implement your loyalty program.
- [Achievements](https://help.openloyalty.io/faq/achievements.md)
- [Favourite Filters](https://help.openloyalty.io/faq/favourite-filters.md)
- [GDPR](https://help.openloyalty.io/faq/gdpr.md)
- [Opt-Out](https://help.openloyalty.io/faq/opt-out.md): How to Allow Users to Opt-Out from the Loyalty Program
- [Referral Programs](https://help.openloyalty.io/faq/referral-programs.md): This article explains how to provide users with the ability to invite friends to the loyalty program by sharing a unique referral link.
- [Returns and Cancellations](https://help.openloyalty.io/faq/returns-and-cancellations.md)
- [Timezones](https://help.openloyalty.io/faq/timezones.md): Understanding how timezones work in Open Loyalty


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