Not sure what class of travel you have booked but this is what the website says:
Economy Class allowance
The number of checked bags you can bring when travelling in Economy Class depends on multiple details, such as your destination and ticket type. Besides, you can always purchase extra bags, during or after booking. We always offer the following baggage allowance per ticket type.
Light ticket: no checked baggage included.
Standard or Flex ticket: 1 item of checked baggage, up to 158 cm (length + width + height) including handles and wheels and with a maximum weight of 23 kg.
On some routes, you can bring 1 additional checked bag on top of the regular allowance. Make sure to calculate the exact number for your route.