Small crack Question

Hi,
I'm new to surfing.
I picked up a used board the other day then realised that it has a couple of small cracks in the final end. Should I be worried about them. Leave them or try to repair them. The one on the corner is the worst. Any advice appreciated. Thanks
I'm new to surfing.
I picked up a used board the other day then realised that it has a couple of small cracks in the final end. Should I be worried about them. Leave them or try to repair them. The one on the corner is the worst. Any advice appreciated. Thanks