Power BI consultants use time-series analysis to explore trends, seasonality, and patterns over time. Using DAX functions and advanced analytics integrations, Power BI consultant analyze metrics like sales growth, website traffic, or production efficiency across periods. Techniques like moving averages, exponential smoothing, and forecasting models are employed to predict future values. Dashboards display these insights through line charts and slicers for interactive exploration. Time-series analysis helps businesses anticipate demand, allocate resources efficiently, and identify long-term trends, providing a foundation for strategic planning and operational optimization.