Most people who go exploring various healing methods throughout their spiritual journeys come across reiki as a way to [balance/realign/heal] the chakras, the seven energy centers in your body.
By now you probably understand the importance of keeping your chakras aligned or balanced and healthy.
Unbalanced chakras can cause trouble in various areas of our lives if left unchecked. Blocked chakras can prevent us from receiving the things we desire.
For example, a blocked throat chakra might stop you from speaking up for what you want (like a raise at work). Because subconsciously, you might not feel worthy of it.