Online promotion refers to the work of publicity, promotion, and marketing through the Internet. Its main purpose is to increase brand awareness, exposure, and influence to attract more potential customers and users to promote sales and growth. The specific content of the online promotion included the following aspects: 1. Web site promotion: This includes search engine ranking optimization, social media promotion, advertising, etc. By increasing the exposure and attention of the website, it can increase website traffic and conversion rate. 2. content marketing: this includes writing and publishing content such as blog posts, articles, videos, etc. to attract and retain the target audience by conveying valuable information and emotions to increase brand awareness and loyalty. 3. Social media marketing: Increase brand influence and exposure by posting, interacting, and advertising on social media platforms to increase user interaction and loyalty. 4. E-mail marketing: Sending marketing emails to potential and existing customers through email to promote sales and growth. 5. Video marketing: By publishing and sharing video content to attract and retain the target audience to increase brand awareness and loyalty. Event marketing: This includes organizing online and offline events to attract potential customers and users to increase brand exposure and popularity. Online marketing was a comprehensive work that required comprehensive consideration of the target audience, content form, channel selection, and delivery strategy to develop a suitable marketing plan and improve the marketing effect and ROIs through continuous optimization and adjustment.