When operating across multiple platforms, how to avoid SEO penalties caused by duplicate content?

The core of avoiding SEO penalties due to content duplication when operating across multiple platforms lies in establishing content uniqueness through content differentiation, platform adaptation, and technical specifications. Typically, efforts need to be made from three aspects: content creation, publishing strategy, and technical optimization, to ensure that the content on each platform is both relevant and independently valuable. Content Differentiation Strategy: Adjust the presentation of core information, such as rewriting titles, reorganizing paragraph structures, or supplementing platform-specific content (e.g., Xiaohongshu focuses on scene-based descriptions, while Zhihu emphasizes in-depth analysis), to avoid full-text duplication. Platform Feature Adaptation: Adjust content forms according to platform user habits, such as using scripted narratives for short video platforms and long-form analysis for blogs, ensuring that the content form matches the platform positioning. Technical Specification Application: Use canonical tags to specify the original page, handle similar content through 301 redirects, and clarify content ownership to search engines; for content with high duplication, add statements such as "Reproduced from XX platform". It is recommended to regularly audit cross-platform content using SEO tools (such as Screaming Frog), focusing on checking the duplication of titles, meta descriptions, and body text, and promptly adjust the content or implement technical specifications to reduce the risk of SEO penalties.