A coffee grade is meaningful within the system that defines it. Different origins may emphasize screen size, growing altitude, physical defects or other criteria. Similar-looking letters on two bags do not necessarily describe the same evaluation.
The source points to labels such as AA, Supremo and numbered screen sizes, alongside processing and altitude terms. These details can help a roaster understand a green lot's physical characteristics. They do not independently settle how a roasted coffee will taste, and the cup can change between harvests.
When shopping, connect the grade to its country or regional grading system and then look for current lot information and a useful tasting description. For roasting, ask for the specifications relevant to your process rather than relying on a marketing abbreviation. A grade can narrow a comparison, but it should not replace attention to producer, handling, roast and freshness. The most useful explanation says what was assessed and what the label leaves unanswered.
The conversation
A good question can make a better brew.