New Relic has introduced sliding window aggregation, a new method for managing alerts that aggregates metrics, smooths out visualizations, and alerts on erratic or infrequent signals. Users can create alert conditions using NRQL queries with advanced signal settings to handle continuous data signals. The platform's faceted baseline conditions allow users to control how data is aggregated in overlapping time windows, creating smoother charts through an intuitive slide mechanism. To get started, users select their desired interval and set up a new condition or edit an existing one, defining signal thresholds and fine-tuning advanced signal settings. New Relic has raised the maximum window duration to 120 minutes, allowing for more flexibility in managing alerts, and users should build an aggregation buffer before evaluating alerts to avoid triggering false positives. By implementing sliding window aggregation, users can effectively manage their alerts and gain insights from their data.