What are the most effective promotion methods now?

The so-called effective promotion is accurate drainage. For example, in the promotion of our website, keywords determined according to customers' search habits are implanted into our website through questions and answers, soft texts, etc., and SEO optimization is carried out, and then pushed to Baidu's homepage. When potential users search for related content, it will be displayed to customers. The first-hand company is forcing us. They have been doing promotion for more than ten years, and the price is not expensive.