Linked from
The 7 pages that link to Malolactic fermentation, each with the reason it gives.
WineRelated: It softens acidity and can add buttery aromas to some wines.
Malic acidRelated: Winemakers use this process to reduce malic-acid sharpness.
WinemakingRelated: This secondary fermentation softens acidity and can add buttery aromas.
OenologyRelated: This secondary fermentation softens acidity and can alter a wine’s aroma.