2. To decide the wine style.
3. To determine must treatment prior to fermentation.
4 To monitor the stability of a wine(e.g. ls a malolactic fermentation occurring when you don't want it? ).
5. To comply with TTB regulations. The regulations dictate the minimum acid levels of 0.5 percent in table wines if the must or wine is ameliorated. Most of the commercially produced wines contain acid levels in the range of 0.6 to 0.9 percent.