Front label vs back label
The front sells. The back tells. The front label is producer name, fanciful wine name, vintage, sometimes the grape. Dressed for the date.
The back label is specific blend percentages, ABV, region details, importer, winemaker's notes, vineyard altitude, soil type, aging details. The real story.
For serious choices, read the back first. The front is marketing; the back is information.
Reading an Argentine label
A premium Argentine Malbec label tells you something like this: CATENA ZAPATA · ADRIANNA VINEYARD · MALBEC · GUALTALLARY · UCO VALLEY · MENDOZA · 2020 · 14% ABV · ESTATE BOTTLED.
That's: trusted producer, single-vineyard cuvée, specific sub-region, specific year, full-bodied, producer-controlled. Icon-level.
Compare a bulk bottle: [BRAND] · “VINTNER'S RESERVE” · RED WINE · MENDOZA · ARGENTINA · NV · 13% ABV. No grape, no vintage, no sub-region, marketing word. Party wine — nothing wrong with it, just know what you're buying.