Do you know that the Government of the UK applies the rule that requires those who want to stay for a certain time in the country to be able to speak English? For example, if you want to stay with your spouse in England while you come from another country, you need to take a B1 English test that you can know more on http://britishlifeskills.com to examine your English skills. The aim is to make sure you can communicate well with other people while staying there.
During your stay, there will be some of the time when you want or need to go out alone. When doing so, of course, you do not want to have any problem, including problems in communicating. As you are in an unfamiliar place, you might need to ask for directions to other people that you need to speak clearly to get the right answer. That is why the test is important as it is also to help you while in the country.