Travelling takes you away from your tense daily routine life and lands you at an exciting new place, much different from yours. You spend some time in a totally new environment, meet people from a different cultural background, visit places that you have never seen, eat food that is of a different taste and experience lot of other things. All that excites you and takes away all kind of tensions from your mind. You feel relaxed, start realizing new realities, accept cultural differences in living styles and come closer to other people. This brings international harmony, friendship and cooperation in many fields, useful for the mankind. Travelling also expands your mental horizon and increase your knowledge. You cannot learn from the books what you learn from your own experience.
Apart from pleasure travelling, people travel abroad for various other reasons. Students travel abroad to get admission in the institutions of their choice. Some people travel for business purposes while others travel for health reasons and medical checkups. The young people mostly travel for seeking employment or getting married. People also travel for professional requirements and family reunion, etc.
Some countries are much cheaper than your own country so visiting and spending some time in one of those countries actually saves you money which you can use for travel expenses.
Some countries need your services and, therefore, offer you better wages and other benefits. If you are a multi-lingual and have experience in teaching a language then you can become a language teacher and earn good money. You can also work as a translator or interpreter.
For whatever purpose you are travelling make sure that you possess proper travel documents and endorsement of visas for the countries you want to visit. It is also important to respect the law of the land you are visiting. Never engage yourself in any illegal activity.