The document discusses several key characteristics used to describe wine: - Clarity - Wines should be transparent, bright, and clear without particles. - Color - Red wines change color from purple to ruby as they age, while white wines change from greenish to deep golden. Intensity is described as watery, pale, medium, or deep/dark. - Fluidity - Fluidity refers to viscosity and is evaluated by swirling the wine. Legs on the glass provide information about body and alcohol content. Fluidity is described as slight, watery, normal, viscous, or dense.