Social media marketing refers to a marketing method that uses social media platform for marketing activities. Due to the increasing popularity and use of social media, more and more enterprises begin to incorporate social media marketing into their marketing strategies. Social media marketing research is mainly applicable to the following types of enterprises:

1. Internet enterprises: Internet enterprises are one of the main application objects of social media marketing. Because their business mainly depends on the network and social media platforms, they need to expand their popularity, increase user stickiness and improve conversion rate through social media marketing.

2. Retail enterprises: With the rapid development of e-commerce, more and more retail enterprises begin to incorporate social media marketing into their marketing strategies, and promote and sell their products through social media platforms to attract more consumers.

3. Media enterprises: Media enterprises are another main application object of social media marketing. They promote their news, information, movies and other content through social media platforms to attract more users and fans.

4. Service enterprises: Service enterprises mainly provide various services, such as tourism, catering and medical care. And promote their services through social media platforms to attract more customers and users.

Generally speaking, any enterprise can expand its popularity, increase user stickiness and improve the conversion rate through social media marketing, but in practice, Internet enterprises, retail enterprises, media enterprises and service enterprises are the main application objects of social media marketing.