The penetration rate is the proportion of households or individuals owning a given good relative to the total number of households or individuals in a market. It allows for the assessment of the market’s potential or saturation, indicating whether it is in a growth or maturity phase. This rate can also be calculated by dividing the total number of devices by the number of households or individuals, but this method may be less relevant in cases of multiple ownership, where several units of the same device are owned by the same household.