Nowadays there are a lot of things, that we use in our daily life. So that, I think that there are no need to advertise some things , such as mobile phones, stationaries, books, e.t.c. On the other hand, there are also many brands which produse the same products, that’s why they advertising their products.
People will continue to buy their necessaries and favourite brand’s products without any advertisements too. And if products are really good and helpful, consumers will recommend that brand to their friends and relatives. In that way they can become popular by the time. However new shops, new brands need to advertise themselves, in order to get people’s attention
Also, if celebrities, bloggers will interested in some products, an they will tell about it to their followers, they can also buy that thing. Because, they have big influence in 21st century. If they will just use, without advertising the product, also the fans will buy and use them
And at this time, there are many people, who shopping online and if the comments will good, they usually buy them. So, in my opinion, if majority of people like the product and it will have many positive comments, people will buy them.
All in all, I think that if the product is good, than no need to advertising them. But if the company wants to be more popular, than they need advertise their products.