What actions should be taken if there is a sudden unexplained surge in AdSense revenue?

If there is a sudden unexplained surge in AdSense revenue, the first action to take is to thoroughly investigate the source of the increased revenue. This involves carefully analyzing AdSense reports to identify any unusual traffic patterns, ad performance metrics, or changes in ad placements. Check Google Analytics for corresponding traffic surges, identify the source of that traffic (organic, referral, direct, social), and examine user behavior on the affected pages. It's crucial to determine whether the increased revenue is due to legitimate factors, such as a viral marketing campaign or a seasonal trend, or whether it could be a result of invalid traffic or click fraud. If invalid traffic is suspected, immediately report it to Google through the invalid clicks contact form and implement measures to prevent further occurrences, such as tightening traffic filtering or enhancing security measures. Ignoring a sudden surge without investigation could lead to penalties or account termination if the increase is due to fraudulent activity.