You can use this guided meditation whenever you want to. For example, you can use it on a regular basis, as a morning meditation or using it just before you go to sleep at night.
Also, you can use it when you need it, like at times when you are stressed or tired or there are negative thoughts going around in your mind, try using this guided meditation, and hopefully afterwards you will feel better and be more relaxed and calm and focused in a pleasant way.
In general, the more you use this guided meditation, the more benefit you will receive from it.