The applet is an application that can be used without a downloading installation. It fulfils the dream that the application can reach the tentacle, and the user can open the application by sweeping or searching. It also embodies the idea of leaving after all, and users do not have to worry about whether to install too many applications. Applications will be everywhere and readily available, but will not need to be loaded. According to the technical interface between the above-mentioned official presentation and the small program, the small program is actually a light application that is highly functional and simple. Different applets perform different functions. For example, the purchase of film tickets, restaurant platoon numbers, restaurant orders, bus searches, stock information, weather checks, radio stations, hotel reservations, shared bicycles, cabling, exchange rate checks, word checks, air tickets, internet purchases... Of course, as a new product of wi-fi, small programs can only be used in wi-fi. Imagine, when you want to buy some fruit snacks without going out, go to the bank and get in line, want to cut your hair but try to find a barber shop that doesn't have to press your cards, or in a strange neighborhood you want to find a convenience store, a hotel, anything you want to find, all you need to do is open up the app. And precisely the same software that you use every day, every day, will make our lives easier. And for those of us who have small programs, when people have these ideas, it means that we have customers. There is a saying that society is driven by lazy people, and it is true that washing machines are invented to facilitate laundry, telephones are invented to help intestines, and a range of products, such as treasures, couriers, takeaways, etc., are introduced to facilitate shopping to make it easy for people to live in. Thus, when there is an ap in front of it that can satisfy the services that need to be provided by more than one ap, or when it happens that it cannot be separated from it every day, most people will choose the former。