First prepare a file containing the data you wish to use. This file can contain email addresses, mobile phone numbers, or mobile device IDs. The file must have at least 1000 data strings and must meet the file requirements. If you have security concerns, the data in your file can be hashed (md5). In this case, every data string needs to be hashed separately.
email@example.com firstname.lastname@example.org email@example.com
Yandex.Audience can use email addresses and mobile phone numbers to find data about users in Russia and the CIS, while mobile device IDs can provide information about users all over the world.
In the Segments tab, click Create segment and choose a suitable option from the Based on my data section, such as Phone numbers. Enter a name for the segment and select the file you've prepared. If the data in your file is hashed, check the box marked Hashed data. Check the box to confirm that you agree to the Terms of Service and click Create segment.
The segment you create will be assigned the “Processing” status. Processing can take up to thirty minutes.
While processing, Yandex.Audience will find matches between the data in your file and all of Yandex's accumulated data. For example, Yandex.Audience can identify your client as a user of one of Yandex's services or a visitor to a Yandex Advertising Network site based on their email address.
If the coverage is at least 1000 anonymous identifiers, the segment status will change to “Finished”. Then you can use this segment to set up your ad campaign.