Advertisers can choose to target users by gender, or use the default setting “All genders”.
On Quora, we use attributes in users’ profiles and behavior to determine their gender. If we cannot determine a user’s gender, we will be place them in the “Unknown” demographic group. This group can be targeted alone or in conjunction with another group. Excluding the “Unknown” demographic group may reduce the number of users you are able to reach, including those you may want to reach.
Advertisers may not illegally discriminate by targeting ads on the basis of gender or other protected categories (for example, targeting ads for housing, employment, or financial services in the United States). This is not an exhaustive list of discriminatory categories and may not be applicable for your region. Advertisers should comply with all local laws and regulations.