Advertising plays an important role in modern life. Currently, a huge amount of advertisements are shown while we are watching television, walking on street or even when we are surfing on internet. In some cases they are entertaining, but in others can result too annoying. On the one hand, advertisements are necessary so that companies can promote their products and, consequently, these can sell. Although, it is truth that sometimes companies are not aware of that advertise a same product many times could get bored consumers. For instance, one product which is advertised in many places during a short period of time, consumers finish tiring of it and even, avoid it. On the othe hand, people need to know which product choose between all what are in the market, and so advertisements are not only necessary, but also absolutely useful. The reason is that to buy a particular product, people prefer knowing it before, and that is shown by advertisements. In conclusion, I think advertisements are extremely important in our society in order to know products and sell them in spite of they can annoy us in occasions.