The long tail theory holds that all non-mainstream markets will add up to form a market larger than the mainstream market, and these small amounts of demand will form a long tail on the demand curve, achieving a large number of minorities. On the long tail, personalization, which has been squeezed and ignored by popular fashion, will be highlighted. A typical example is the opportunity that the Internet brings to books. The production and dissemination costs of a book in a bookstore are not the same as those on the Internet. The unlimited space of the Internet makes the cost drop, and the total sales with the least demand can always match the total number of mainstream and most needed bestsellers.
Which of the following conforms to the context?
The essence and content of long tail theory