An attunement is a spiritual ceremony. "Getting attuned to Reiki" (usually during a class) opens up the channels to Reiki even more. A class is an opportunity for personal and spiritual growth. You can use it for your self, but also to help others including animals and plants.

An attunement will assist in releasing denser (lower vibrations) energies in your Aura and Chakra Centres. This can cause vivid dreams, flu-like symptoms or sometimes short lived depression, however it is just a way of the body ridding itself of "old stuff" no longer useful to you, resulting in balance and peace! You will keep the attunement for life, although re-attunements are still recommended.