GlossarySee it in the platformHow Tightly does demand forecasting
Demand & forecasting
What is seasonality?
The repeating pattern of demand across the year for a product or category.
Why it matters: It tells you when to buy in, peak and clear. Plan against the wrong shape and you land stock late or hold it too long.
How it's worked out: A seasonal index expresses each period against the average; 1.4 means 40% above average demand.