Monitoring unusually high click-through rates paired with very low engagement or conversion rates can reveal suspicious activity. Analyzing IP addresses, device fingerprints, and geographic locations helps identify repeated or automated clicks from the same sources. Tracking session duration, bounce rates, and page interactions shows whether visitors behave like real users or bots. Sudden traffic spikes at odd hours or from unexpected regions can also signal fraud. Comparing performance across publishers helps uncover placements generating low-quality traffic. Insights from these patterns guide blocking fraudulent sources, refining targeting, and protecting ad spend.