Nowadays, knowing cultures for visitors and business people is an important part of travel and business. It is obvious that understanding of many cultures brings many benefits while lack of familiarity may make some problems for those people who do not understand a new culture during encountering with it.
The main advantage of knowing many cultures is that individuals to be social people and closer to each others by better ways in communication with strange people.
Other advantage is that contacting with cultures lead to lots of information from host society such as language, traditions habits and other things.
A further advantage is that familiarity with many cultures makes strong economic relations and decreases tension between nations and countries. For example, European Union is a good sample of this situation which has made European countries as a well-known successful economic and politic community in the world by a unique policy and shared currency. In addition, this contacts and relations develop tourism industry. Through these years, tourism industry has become one aspect for attraction of nations and countries.
On the other hand, lack of familiarity of culture and traditions of people may lead to misunderstanding and tension between different communities. For instance, many wars have occurred in the world regarding this misunderstanding in the past, which they have decreased because of communication progress.
In conclusion, I think that the travelers and businessmen achieve many experiences in abroad contacts during their working-life (job/occupation) and those experiences help them to overcome many difficulties.