1. Content: Content is the cornerstone of SEO. We need to provide valuable content, which is crucial to attracting users and search engines.

2. Keywords: Keywords are an important bridge connecting users and content. Users usually search for content they care about by entering keywords. Therefore, choosing the right keywords will have a profound impact on SEO results.

3. Links: Links are a manifestation of the relationship between websites. High-quality external links can enhance the authority and credibility of a website.