Yes, the product is intended to be used before styling when your hair tends to feel coarse or look fluffy. Applying it to towel-dried hair before blow-drying gives the cuticle a smoother surface to start from, which usually means less frizz and a more polished result once the hair is dry.
The conditioning agents and silicones in the formula create a light layer over the hair shaft. That layer reduces friction while you brush or blow-dry, so the hair is less likely to be roughened by mechanical stress. In practice, this means the comb or brush glides more easily and the lengths are less likely to snag or stretch while they are wet — a stage when hair is more vulnerable to damage.
However, this serum is not labelled as a dedicated heat protectant. It can help with the mechanical side of styling and with the general condition of the hair, but if you regularly use a flat iron, curling iron or very hot blow-dryer, it is safer to use a product that is specifically designed for heat protection. You can apply this serum first for smoothing and then a heat protectant on top, or choose one product depending on your priority for that day.
For best results, apply the serum to damp hair, wait a minute for it to absorb, and then dry with moderate heat. Keep the dryer moving and avoid holding it in one spot, since concentrated heat can damage coloured hair faster than diffuse heat.