Functional requirements:

● Manage Ads: Advertisers should be able to add, update, view and delete an Ad campaign

● Ad Config: The ad campaign would have target users, creative, budget per day, expiry, redirect URL

● Serve Ads: The system should serve suitable Ads to target users based on gender, age, location

● Engagement Tracking: The system should be able to track Ad impressions (Ad views & Ad clicks)

● Budget Pacing: The system should be able to control the Ad serving rate to avoid over-delivery

● Campaign State: The campaign could be in either active, expired, paused or removed state

● Reporting: The advertiser should receive the campaign report and invoice with the total amount to pay

Non Functional requirements:

● Low Latency

● High Availability