Coffee Acidity

When people talk about coffee, a word that may be used is ‘acidic’.
The Specialty Coffee Association of America describes acidity as “contributing to a coffee’s liveliness, sweetness, and fresh-fruit character.”
The Webster Dictionary defines the word acidic as “having a very sour or sharp taste.” The Specialty Coffee Association of America describes acidity as “contributing to a coffee’s liveliness, sweetness, and fresh-fruit character.”

When acidity is referred to in the context of coffee, it will be in reference to specific flavour compounds.
This includes the likes of citric acid or tartaric acid, which may be present in the coffee beans. These notes can taste wonderful and are more commonly found in light-roasted single-origin coffees.

For further reading at the following link : https://www.aeropress.co.uk/blogs/news/what-acidity-coffee-mean and https://henryshouseofcoffee.com/2014/09/01/coffee-acidity-explained/