Ad display policy for sensitive subjects
Sensitive subjects include ads related to the user's personal (rather than public) information, personal difficulties, and emotions. Examples are ads about the treatment of certain serious diseases, intimate health problems, addictions, and so on.
Yandex does not display ads related to sensitive subjects based on behavioral targeting or retargeting lists. This rule applies even if your ad passed moderation and you set up your targeting criteria correctly. Ads relating to sensitive subjects can appear in search results, and in the Yandex Advertising Network and ad exchanges (when targeted to match the page content), except for adult subjects and tragic content. Ads related to sensitive subjects can't be placed in Telegram channels.
Yandex imposes additional restrictions on advertising tragic or adult content: these ads may only be displayed on search sites in response to an explicit query from the user. Ads for adult content can also be shown on sites with adult content in ad networks. Learn more about advertising adult subjects or tragic content.
For the list of rules and requirements, see the following documents: