Energy Consumption Per Month of Freezer
It means that the appliance will consume 168 kWh of energy in one year. 1 kWh (kilowatt-hour) is a measure of energy and is equivalent to the energy used by a device drawing 1 kW of power for 1 hour, which is equal to 3.6 MJ.

Here in the US, electricity rates range from about $0.10 to $0.40 per kWh, so one could expect to pay somewhere between $20 and $70 to operate that freezer over the course of one year. You can get a similar estimate using your own rate.