This belt is described for situations after abdominal procedures and after childbirth, including Caesarean section. That means a person who has had a C-section may be given such a belt by their doctor or midwife as part of the post-birth period. It is also chosen during physically demanding work when the abdominal wall and lower back can use added steadiness.
Whether it is suitable for you depends on your specific condition. If you have stitches, a wound, persistent pain or any complication after childbirth, do not use the belt without explicit advice from the clinician following you. The belt provides only mechanical fixation, so it never replaces the treatment plan or instructions of your medical team.
If you are pregnant, do not assume this is a pregnancy support band. It has a different structure and is designed for a different purpose. Ask the professional who is following your pregnancy before using it. If the belt causes pain, numbness, breathing difficulty or signs of impaired circulation, take it off immediately and contact your doctor.