1. Amazon, AliExpress, Shopee and eBay are all e-commerce platforms, but they have some differences in operation mode, market positioning and user groups.

2. Amazon is one of the world's largest e-commerce platforms, mainly self-operated and third-party sellers, providing global commodity sales and logistics services. AliExpress is a cross-border e-commerce platform under Alibaba, mainly targeting overseas buyers, providing global commodity procurement and wholesale services. Shopee is an e-commerce platform in Southeast Asia, mainly targeting consumers in Southeast Asian countries, providing local commodity sales and logistics services. eBay is a world-renowned e-commerce platform, mainly based on auction and fixed price sales, providing global commodity trading and logistics services.

3. Amazon has advantages in global market share and commodity variety, and provides perfect logistics and customer service; AliExpress focuses on cross-border trade and provides one-stop procurement and wholesale services; Shopee has a strong market influence in Southeast Asia and provides localized commodities and services; eBay is famous for its auction model and global trading platform. The differences in operating models, market positioning and user groups of these platforms give them their own advantages and characteristics in different regions and markets.