Phos on Nostr: Can anyone tell me what the reason for the cuts going into the traces where ...

Can anyone tell me what the reason for the cuts going into the traces where components connect is? (as in the ones in the bottom left side)
I cannot come up with any reason why they are necessary or what they do.
For context these are 220V AC inputs going into a AC to DC switch mode power supply (the little 8=pinner)

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