Keybed adhesive strips - What are they for?

On the delivery note from LetMeRepair (KK S88 MK2) they say that 7 keybed adhesive strips 16x30 mm have been replaced. What are they for?

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Replacing them improves key feel, reduces mechanical noise, and extends the keybed durability of your S88MK2

Replacing them improves key feel, reduces mechanical noise, and extends the keybed durability of your S88MK2

Thanks, Jeremy!

So it's not only greasing that makes a difference then.