This truth is also called the Dukkha.It states that suffering and the impermanence of pleasure is inevitable. Suffering is inevitable because you are not perfect and neither is the world you live in. It also says that when you have struggled and achieved that which you want so much, even the pleasure of having it is just passing. Dukkha is seen in life when you get sick, sad or disappointed, when you lose a loved one and get old someday, among other pains.
This second truth is the Samudaya. This truth says that the reason you suffer is because you want to have and control things. Since what you want to have is impermanent or transient, you suffer when you lose them eventually. Samudaya discourages you from craving sensual pleasure, fame and from attempts to avoid unpleasant sensations such as fear, anger or jealousy.
This is the third truth and you can attain it through Nirodha. It means willing yourself to let go of all manner of clinging and desire and it is a process that takes you through many levels. When the last of the desire and craving is gone, you enter the state of Nirvana, where you no longer have any desires. You can never understand Nirvana unless you attain it.
This is the Fourth Noble Truth, or Magga, and states that in order to end suffering you must follow the Eightfold Path. The Eightfold Path is staying in the middle between the extremes of involvement in pleasure and abstinence from pleasure. Following the Eightfold Path will help you avoid getting reincarnated and undergoing more suffering in life. Meditation helps you practice mindfulness of the things you crave for and cling to, achieving the objective of Magga and eventually leading you to the path to enlightenment.