Meditation is training / exercise for the mind. Meditation's ultimate goal is to help you retrain how your mind thinks so that you can become free from suffering. To train yourself to change the type of thoughts you have, and be able to reduce and eventually stop having thoughts that cause you to suffer. As you become increasingly free of the suffering, caused by your mind, you will find yourself becoming more happy, joyful, peaceful, kind, and generous... both to those around you, and to yourself.

You can learn to meditation, with nothing more than the two websites below:

Here are basic meditation instructions regarding where & when, posture, your state of mind, focusing on the breath, etc...