In sommelier-speak, “typical” has a very exact meaning: embodying the characteristics of a terroir. And terroir means the sum of three elements: the grape, the soil, and the micro-climate. Sauvignon blanc from Sancerre is very different from a Sauvignon blanc from either the Marlborough region in New Zealand or Friuli in Italy.
The more typical a wine, the easier it is for connoisseurs to recognize it.
A technical note: micro-climate is different from weather: The weather influences the vintage and can change every year, whereas the micro-climate tends to repeat itself. As an example, a certain hill can always be very low in humidity and great at draining off water, even if one season the weather brings more rain than the next.