Yes! The most important thing is to get the serum to your scalp, and to apply regularly. Applying on the cleanest scalp possible will get the best results, and here are some things that you can do to improve your results.
Apply the serum to a clean scalp, preferably after washing and towel (or blow!) drying.
Apply the serum at night so that the serum can work during your body's natural restorative process.
After applying the serum, massage it into your scalp with fingertips (not nails!) to increase circulation and improve penetration.