No. We send cryptographic hashes of contact identifiers (email addresses, phone numbers or mobile advertising IDs) to the networks via API, so they can never see the personal data that they do not already have. Furthermore, all the networks that we partner with have documented privacy and information security practices related to Custom Audiences, which you can read here:

• https://www.facebook.com/ads/manage/customaudiences/tos.php
• https://www.google.com/policies/privacy/
• https://ads.tiktok.com/i18n/official/policy/privacy

This diagram illustrates the encryption workflow:

No, just as we do not share your clients' personal data with the networks, they do not share the data they have with us. We receive reports at campaign level, not contact level.

Yes, through the ad network. All networks have mechanisms that allow people to opt out of receiving ads from the advertiser.

Not necessarily. The networks automatically exclude users in the source audience, but they do not check to see if the users they select for the lookalike audience are already in your database (or even in another custom audience). It is therefore possible that some existing contacts may also appear in lookalike audiences. To avoid this, you should explicitly exclude all your other audiences when launching the campaign from the network.

Emarsys immediately requests that the lookalike audiences be created on the ad network; the network does the rest, and there's nothing Emarsys can do to influence the speed of that process.

You can create up to 100 audiences per Emarsys account. If you require more audiences than this, please contact Emarsys Support to increase the limit for you.

Your audiences are only limited by the thresholds set by the network before they can be targeted:

• A Facebook audience must have a minimum of 100 contacts, but Emarsys recommends a minimum of 1,000 contacts.
• Google and TikTok require at least 1,000 contacts.

In order to optimize your advertising budget spend, you should always consider removing a contact from an audience once they have converted, as shown in the automated program below.

It can take a few hours for the networks to match an audience once a request has been received (although this is usually much quicker). Emarsys sends audience updates:

• In real time, if a contact is added to an audience through the Automation Center.
• Daily for segment audiences.

You can create up to 100 audiences in total, each containing up to 20 million contacts.

The total of 100 audiences includes the archived audiences. If you run out of audiences, we recommend cleaning up your audiences in order to create more.

Due to API tariff limits, the total number of contacts in all audiences for a connection should not exceed 100 million contacts, otherwise we will not be able to keep all audiences up-to-date.

Yes. As long as the list has not been deleted or renamed, Lead Ads will recognize it when auto-generating the subscription name. Any previously added contacts will remain in the contact list, and new subscriptions will be added to it.

No, the ad networks do not share their customer data with us.

Media costs are not included and are billed separately by the ad network.

This status means that the network is processing and analyzing the successfully transferred audience. Depending on the network, it may take some time for a newly created audience to become available for use:

• Meta: up to an hour
• Google: up to 24 hours
• TikTok: up to an hour

You authorize the Digital Ads app to access your existing ad network account to create and manage audiences on your behalf. Billing is done directly between you and the network.

The easiest way to do this is to use automation programs and split your contacts into a control group so that you can compare the average spend of the two groups, as shown in the example below.