Online promotion referred to advertising, promotion, and marketing through the Internet to increase brand awareness, exposure, and sales. Its main purpose was to attract more potential customers and increase website traffic and conversion rates. There were many ways to promote online, including search engine optimization (SEO), search engine marketing (SIM), social media marketing, email marketing, content marketing, and more. Among them, the two most commonly used methods were SEO and SIM. They were mainly used to improve the ranking and exposure of the website in search engines by improving the content and structure of the website, thus attracting more interested customers. On the other hand, social media marketing was used to promote brands, products, or services through social media platforms such as Weibo, WeChat, and Facebook to establish contact with potential customers and increase exposure. E-mail marketing was to send marketing emails to potential customers through the mail system for promotion and marketing. On the other hand, content marketing promoted brands, products, or services by creating valuable content such as blog posts, videos, and pictures to increase brand awareness and recognition. Online marketing is a very important marketing strategy that can help companies attract more potential customers and increase sales and market share.