Final answer:
Social networking sites measure success through metrics such as user engagement, active users, and revenue.
Step-by-step explanation:
A social networking site measures its success through various metrics such as user engagement, number of active users, and revenue generated. User engagement can be measured by metrics like number of likes, shares, and comments on posts. The number of active users reflects the platform's popularity and growth. Finally, revenue generated through advertising or premium services indicates the site's financial success.
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