1. A method comprising: detecting, by a processor, user interactions from at least a first user and a second user concurrently engaged with a first client device; in response to detecting the user interactions, obtaining, by the processor, user characteristics for the first user and the second user; determining, by the processor, an age of the first user and an age of the second user based on the user characteristics of the first user and the second user; determining, based on the age of the first user and the age of the second user, that the first user is older than the second user; in response to determining that the first user is older than the second user, identifying, by the processor, the first user for targeting; and selecting, by the processor, content for the first client device, the content being specifically selected for the first user based on at least one of the user characteristics associated with the first user.