When managing multiple VK Ads Manager accounts, what is the most efficient method for sharing custom audiences across accounts while adhering to privacy regulations?

The most efficient method for sharing custom audiences across multiple VK Ads Manager accounts, while adhering to privacy regulations, involves using VK's 'Audience Sharing' feature with hashed data and strict access controls. First, identify a central VK Ads Manager account that will serve as the owner of the custom audiences. This account will be responsible for creating and managing the audiences. Then, within the central account, create your custom audiences using data collected from your website, app, or CRM. Before uploading any customer data, ensure it is properly hashed using a secure hashing algorithm like SHA-256. Hashing transforms the data into an irreversible code, protecting the privacy of individual users. When creating the custom audience, choose the option to share the audience with other VK Ads Manager accounts. Specify the specific accounts you want to share the audience with and grant them appropriate permission levels. There are typically two permission levels: 'Read Only', which allows the other accounts to use the audience for targeting but not modify it, and 'Edit', which allows them to modify the audience. It is crucial to grant the minimum necessary permission to each account to maintain data security. Each receiving account can then use the shared custom audience in their advertising campaigns, targeting users based on the shared criteria. VK's system ensures that the underlying data remains protected and that individual user information is not exposed to the receiving accounts. Throughout the process, adhere to VK's advertising policies and all applicable privacy regulations, such as GDPR or CCPA, by obtaining proper consent from users before collecting and using their data for advertising purposes. Regularly audit the access permissions and shared audiences to ensure data security and compliance.