Google Search Ecosystem 2025: Technical Compliance, Infrastructure Architecture, and React Integration

1. Executive Summary

This report provides a comprehensive analysis of the technological standards, protocol support, and indexing mechanisms defining the interaction between the Google Search Engine and the web ecosystem as of 2025. The internet has evolved from a simple network of static HTML documents into a dynamic platform dominated by complex JavaScript applications, rich media, and AI-driven interactions.

Google's 2025 vision is built on 'making sense' of this complexity, making user experience (UX) measurable through performance metrics, and maximizing resource efficiency. The Next.js and React architecture we have adopted at Hitit Medya is a strategic choice specifically designed to provide the speed and efficiency required by this vision.

The report's key finding is that Google's 2025 strategy is shaped around three main axes: Speed and Efficiency (AVIF, INP, HTTP/3), Semantic Understanding (Structured Data refinement, AI Overviews compliance), and Mobile Continuity (PWA, Mobile-First Indexing). In particular, the abandonment of past 'workarounds' like Dynamic Rendering in favor of standardizing Hybrid Rendering and Server-Side Rendering (SSR) architectures demonstrates that the search engine has turned the principle of 'seeing what the user sees' into a technical mandate.

2. Web Rendering Architecture and JavaScript Processing Strategies

The year 2025 represents a definitive period of maturity in how Googlebot perceives web pages, particularly in the processing (rendering) of JavaScript-based content. Discussions previously limited to 'crawlability' have shifted to the axes of 'processing cost' and 'render queue' management.

2.1. Modern Crawl Cycle and Evergreen Googlebot

As of 2025, Googlebot continues to operate on the most current ('evergreen') version of the Chromium engine. While it natively supports ES6+ JavaScript features, there is a vast difference between 'supporting' and 'efficiently processing'. The crawl process consists of the following stages:

• Initial Fetch: Googlebot sends an HTTP request (GET) to the server. The first 15 MB is critical.
• Fast Pass: Text and href links within the HTML are analyzed. Sites using SSR (such as projects developed by Hitit Medya) gain an advantage at this stage.
• Render Queue: Sites using CSR (Client-Side Rendering) are queued. Due to CPU optimization, this waiting time can delay indexing.

If the server returns a 200 (OK) code but the content fails on the client side, this is perceived as a 'Soft 404' and wastes crawl budget. For this reason, we offer SSR architecture as a standard in our custom software solutions.

2.2. The End of Dynamic Rendering and Hybrid Architecture

Google no longer views 'Dynamic Rendering', a method it suggested between 2018-2022, as a 'best practice'. In 2025, the ideal architecture is the Hybrid Rendering and Hydration model. The server sends the page skeleton as HTML, and JavaScript brings it 'to life' in the browser.

3. User Experience Signals: INP and Core Web Vitals

The weight of technical performance in ranking algorithms has increased. The focus has shifted from 'machine speed' to 'perceived human experience'.

3.1. INP (Interaction to Next Paint)

Replacing the FID metric, INP tracks all interactions throughout a user's session. It covers not just the first click, but menu openings and cart actions as well. 200ms and below is considered 'Good'. In Hitit Medya's web design projects, thanks to React 19 and Next.js optimizations, these times are generally under 50ms.

3.2. LCP and CLS

Visual stability (CLS) and loading speed (LCP) remain critical. The 2025 LCP target is under 2.5 seconds. The AVIF format and HTTP/3 support play a key role in achieving these targets.

4. File Formats and Media Innovation

4.1. AVIF: The New Visual Standard

Fully supported by Google Images, AVIF offers over 50% better compression than JPEG. It supports HDR and Wide Color Gamut (WCG). Since it directly improves LCP time, its contribution to SEO performance is significant.

5. Structured Data and Semantic Strategy

2025 is a year of simplification in structured data (Schema.org) policy. 'Visual decoration' has given way to 'transactional trust'.

• Removed: Rarely used schemas like Vehicle Listing, Learning Video, and Special Announcement have been removed.
• Mandatory Fields: 'MerchantReturnPolicy' and 'returnPolicyCountry' fields have become mandatory for e-commerce.

These changes are part of the goal to transform search results from an 'information engine' to a 'transaction engine'. These new schema structures are automatically integrated into our SEO services.

6. The Age of AI: AI Overviews and RAG

Google's Gemini-backed AI Overviews (SGE) area requires content to be not just 'indexable' but also 'summarizable'.

• Content Chunking: Hierarchical HTML structure (H1 > H2 > H3) makes it easier for AI to make sense of content.
• Q&A Format: Content that gives clear answers increases the chance of being featured in AI summaries.

7. Conclusion

The 2025 Google Search report demands that web sites be not only accessible but also performant (INP, AVIF), semantic, and trustworthy. As Hitit Medya, our infrastructure choices (Next.js, Vercel Edge Network, React Server Components) are designed to meet these technical requirements by 'default'.