der Vorzug
advantage
An advantage or positive quality that distinguishes a person or thing from others.
Der größte Vorzug dieser Wohnung ist der Balkon mit Seeblick.
The biggest advantage of this apartment is the balcony with a view of the lake.

advantage / preference
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advantage
An advantage or positive quality that distinguishes a person or thing from others.
Der größte Vorzug dieser Wohnung ist der Balkon mit Seeblick.
The biggest advantage of this apartment is the balcony with a view of the lake.

The word is made up of 'vor' (before / in front of) and 'Zug' (pull / move). The idea behind it is that a quality or thing is symbolically 'pulled forward' because it is better than others.
Der entscheidende Vorzug dieses Modells ist seine lange Akkulaufzeit.
The decisive advantage of this model is its long battery life.
The expression 'jemandem/etwas den Vorzug geben' (to give preference to someone/something) has a fixed structure. The preferred thing is in the dative. If you make a comparison, the other option is connected with the preposition 'vor' plus dative.
Viele Menschen geben dem Fahrrad den Vorzug vor dem Auto.
Many people give preference to the bicycle over the car.
When talking about an advantage, 'Vorzug' (advantage) is often combined with certain adjectives. Common phrases include 'ein entscheidender Vorzug' (a decisive advantage), 'ein wesentlicher Vorzug' (an essential advantage), or 'der größte Vorzug' (the biggest advantage).
Ein wesentlicher Vorzug des Hauses ist der große Garten.
An essential advantage of the house is the large garden.
quality
'die Qualität' and 'der Vorzug' can both describe something positive about a thing or person. 'Qualität' refers more to how good something is overall, or to the characteristics that determine its value. 'Vorzug' refers to a specific advantage that makes something seem better or more suitable than something else. The words can be confused because good quality is often an advantage. A practical tip: for general goodness, use 'Qualität'; for a specific plus point in comparison, use 'Vorzug'.

Ein großer Vorzug dieser Wohnung ist, dass die Bahn direkt vor der Tür hält.
A major advantage of this apartment is that the train stops right outside the door.
Vor dem Kauf prüfe ich die Qualität des Fahrrads genau.
Before buying it, I carefully check the quality of the bicycle.