What specific setting *determineswhich users can be reached to advertise towards on your account on Mail.ru?

The specific setting that *determineswhich users can be reached to advertise towards on your account on Mail.ru is the *targeting criteria defined within your ad campaigns or ad groups. Targeting criteria encompass a range of settings that define your desired audience, including demographics (age, gender, location), interests, behaviors, custom audiences (uploaded customer lists), lookalike audiences (users similar to your existing customers), contextual targeting (based on website content), and device targeting. By configuring these settings, you specify the characteristics and behaviors of the users who are eligible to see your ads. For example, you might target users aged 25-34 who are interested in technology and live in Moscow. The combination of these settings determines the reach and relevance of your ads, ensuring that they are shown to the most appropriate audience segments.