1.Grape Varieties: Common grape varieties used in Champagne include Chardonnay, Pinot Noir and Pinot Meunier. Different varieties of grapes have unique flavor profiles, such as Chardonnay for freshness and elegance, Pinot Noir for structure and power, and Pinot Meunier for fruitiness and roundness.
2.Vineyard Terroir: The type of soil, topography, and climate of the vineyard (including temperature, sunshine, rainfall, etc.) all affect the growth and ripening of the grapes, and therefore the taste of Champagne. For example, limestone-rich soils may give grapes a higher acidity and minerality.

3.Vintage: Vintage Champagnes are made using grapes from a single vintage, while non-vintage Champagnes are blends of base wines from multiple vintages. Vintage Champagnes reflect the climatic characteristics and quality of the grapes in a given year and may have more character and complexity on the palate.
4.Winemaking process: This includes the type of pressing, primary fermentation, malolactic fermentation, and the amount and composition of dosage. Gentle pressing reduces the extraction of bitterness and astringency, malolactic fermentation softens the acidity, and the amount and composition of dosage affects the sweetness and balance on the palate.
5.Ageing time: the longer the Champagne is aged in the bottle, the richer the flavors from yeast autolysis will be, and the more complex and delicate the taste will be.

6.Storage conditions: The right temperature (usually 10-15 degrees Celsius), humidity and protection from light help to maintain the quality and flavor of Champagne. Improper storage conditions may result in damage to the wine.
7.DISGORGEMENT TIMING: The timing and manner of the disgorgement operation will also have an impact on the taste of the Champagne.