Sou Hu Cai Jing·2025-12-17 15:07Core Insights - The core update of Baidu's Blue Sky algorithm in December 2025 increased the weight of page loading speed to 12%, a 3 percentage point increase from the previous year, with unverified MIP sites potentially facing a 15%-20% drop in mobile search rankings [1][6] - Google's AI overview feature now covers 13.14% of search queries, significantly impacting the technology, health, and social sciences sectors, indicating a shift in traditional SEO practices [1][3] - The SEO landscape has transformed from simple keyword stuffing and link building to a complex system focusing on technical optimization, content quality, user experience, and brand trust [1][3] SEO Strategy Core Elements and Overall Trends - SEO has evolved into a user-centered ecosystem that integrates keyword optimization, content creation, link building, site mapping, and search engine submission, where any weak link can undermine the entire strategy [1][3] - The dominance of the top 10 e-commerce sites in the U.S. is evident, capturing 88% of organic traffic, with leading companies averaging 859 times the traffic of smaller sites [3] Core Algorithm Updates: Baidu and Google - The frequency and intensity of search engine algorithm updates have reached historical highs, with both Baidu and Google focusing on content quality, user experience, and anti-cheating measures [4][5] - Baidu's updates have included significant changes aimed at improving content quality, such as the crackdown on low-quality content and the introduction of new evaluation criteria [5][6] Technical Optimization Key Points: Mobile-First and Structured Data - Mobile-first indexing has become essential, with mobile search accounting for 68% of total searches in China and 78% in the U.S. [9][10] - Key technical optimization points include enhanced content quality, user experience standards, and strengthened anti-cheating mechanisms [10][12] Content Strategy Upgrade: E-E-A-T Principles and AI Content Balance - The content strategy has shifted towards a focus on expertise, authority, and trustworthiness, encapsulated in the E-E-A-T principles, which emphasize the importance of content authenticity and utility [18][19] - AI content generation has become a significant factor, with 71.7% of web pages being produced through human-AI collaboration, although purely AI-generated content remains less favored by search engines [20][21] Link Building and Brand Trust Development: Shift from Quantity to Quality - The focus has shifted from the quantity of backlinks to their quality and relevance, with search engines intensifying their efforts to combat spammy links [22][23] - Brand trust has become increasingly important, with reports indicating that 73.5% of traffic in the jewelry and luxury goods sector comes from direct brand searches [24][28] SEO Strategy Implementation Overview and Future Outlook - A successful SEO strategy requires a systematic approach that includes strategic planning, technical optimization, content creation, and brand building [29][30] - Future trends in SEO will likely include the continued integration of AI, deeper semantic search capabilities, and a focus on personalized search results [33][35]