
aufwerten
to upgrade
To increase the value, quality, or reputation of something or someone.
Durch die Renovierung wurde die Wohnung deutlich aufgewertet.
The renovation significantly upgraded the apartment.
to upgrade / revalue
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to upgrade
To increase the value, quality, or reputation of something or someone.
Durch die Renovierung wurde die Wohnung deutlich aufgewertet.
The renovation significantly upgraded the apartment.

to revalue
To officially raise the exchange rate of a currency so that it becomes more expensive compared with other currencies.
Die Zentralbank hat beschlossen, den Franken gegenüber dem Euro aufzuwerten.
The central bank decided to revalue the franc against the euro.
'Aufwerten' (to upgrade / revalue) is a separable verb. The prefix 'auf' separates from the verb in a main clause and goes at the end.
Ein neuer Anstrich wertet das Zimmer sofort auf.
A new coat of paint immediately upgrades the room.
The word consists of the prefix 'auf' (in the sense of 'upward') and the verb 'werten' (to determine a value). So the meaning is literally to increase the value of something.
Man kann einen einfachen Salat mit guten Zutaten stark aufwerten.
You can greatly upgrade a simple salad with good ingredients.
In general usage, people often describe what something is upgraded by. For this, the preposition 'durch' (through/by) is used. Typical objects are 'Wohnung' (apartment), 'Stadtteil' (district/neighborhood), or 'Image' (image).
Der Stadtteil wurde durch neue Parks und Cafés aufgewertet.
The neighborhood was upgraded by new parks and cafés.
This meaning is specific to the field of economics and finance. You can recognize it from the context when currencies, central banks, or the foreign exchange market are being discussed.
Die Nationalbank könnte die Währung aufwerten, um die Inflation zu bekämpfen.
The national bank could revalue the currency in order to fight inflation.
to improve
A product or service can be improved or enhanced. Verbessern generally refers to better quality or function, while aufwerten particularly emphasizes greater value, a better reputation, or a more premium impression. For better performance, „verbessern“ is appropriate; if something is meant to seem more valuable or prestigious, „aufwerten“ is usually more suitable.

Der Hersteller wertet das Produkt mit einer hochwertigen Verpackung und einem eleganten Design auf.
The manufacturer enhances the product with high-quality packaging and an elegant design.
Der Hersteller verbessert das Produkt, indem er die Akkulaufzeit verlängert.
The manufacturer improves the product by extending its battery life.