Sexyaqr,
You can wet your hair then towel dry, apply the concentrate to your scalp, massage it in from your hairline back. Leave it on for 1 -2 minutes then rinse, then shampoo and condition.
Now when I went to the salon, she shampood me 1st, then applied the concentrate to my scalp, massaged it in (as stated above) applied a regular conditioner to my strands then placed me under the dryer for 15 minutes. She then lightly shampood my hair then applied conditioner and detangled my hair with the conditioner, then rinsed my hair.
How you decide to use it is up to you, but these are the two options I know of.
Let me know if you have any other questions.