1. Doudian e-commerce is an e-commerce model based on the Douyin platform, which allows users to purchase goods directly on Douyin.

2. The reason for Doudian e-commerce is that the number of users on the Douyin platform is huge, and users have a high acceptance of short video content. By displaying products on Douyin, the characteristics and usage of the products can be more intuitively displayed, which increases the user's willingness to buy.

3. The advantages of Doudian e-commerce include: The advantage of Doudian e-commerce is that it can be purchased directly on Douyin, which is convenient and fast; at the same time, Doudian e-commerce also needs to pay attention to the quality of the products and after-sales service to improve user satisfaction and loyalty.