Identify the material
Wood, laminate, tile, resilient flooring and carpet fail differently.
Moisture symptoms need cause finding
Replacing a damaged finish before correcting moisture can repeat the failure.
Movement can be below the finish
Loose tile or squeaking may involve substrate, framing or installation conditions.
Match repair to visibility
A small repair may be structurally fine but cosmetically noticeable; decide whether that matters before authorizing scope.
Safety boundary. General planning information only. Do not open, dismantle or work on hazardous electrical, gas, structural, fire-protection or contaminated-water systems unless you are appropriately qualified and authorized.