There is a fact everyone has to accept is that the part of the world we don't know is bigger than the part we have known. When we face new things, we need to learn something about them. who can help us and how to help us ? In that case, advertisement was created. A few sentenses or a short video are often used to describe a new item. When we need to buy some essentials we don't have a total realization, we usually want to know more information about them from advertisement. An advertisement can give us some useful description about the items, that always influnces us to make a decision on whether buying them or not. But every store only tells us the advantages of their products. Only after using them, we can understand whether it is the one they told us on their advertising. So in today's society, no matter how attractive the advertisement is, people just believe two things, one is brand, the other is price. The items have higher price usually have better quality.These big brands usually have great reputation which also help them get bigger and stronger. But the quality of the items made from small factories usually doesn't woth trusting.