Everything in this world has its own vibration, but you will remain oblivious to the vibrations of your own body and the world around you until you have opened your kundalini. There are many benefits to having your kundalini open and to being able to feel the vibrations which you emit on a daily basis. The vibrations of your body are an indication of whether things are balanced and stable within your body or not, they are also a way to experience a deeper level of understanding of yourself.
Vibrations can be fine-tuned, like you would tune a radio to a specific station, you can have positive vibrations or you can have negative vibrations, the positive vibrations will encourage positive actions and results from the world around you, while negative vibrations will attract negative actions and results.
With meditation you will be able to feel the vibrations of your body and your own energies, most people experience these vibrations on their hands and over their back. With your kundalini open you will be able to use meditation to experience your own vibrations and you can partake in various exercises to increase your vibrations into a more positive state by balancing out your vibrations and dealing with all negativity that you think and feel about yourself.
The main focus of meditation and vibrations is that you are positive, balanced and have your kundalini open so that you can experience these vibrations and benefit from the deeper understanding of yourself and the world around you.