Its primary use is to measure the actual interior temperature of an oven, providing an accurate, real-time reading in both Fahrenheit (ranging from 100°F to 600°F) and Celsius (ranging from 50°C to 300°C). Because built-in oven thermostats are frequently inaccurate and can fluctuate wildly, this tool helps bakers and cooks ensure their oven reaches the precise temperature required for recipe safety and consistent baking results.