October 2025 brought some significant developments in how search is evolving, with Google’s major voice search upgrade, mysterious ranking volatility that had everyone speculating about hidden updates, and a sobering reality check on AI referral traffic. It was a month that reminded us the search landscape continues to shift in both expected and unexpected ways.
Let me walk you through everything that happened and what it means for your website.
Google’s Speech-to-Retrieval Voice Search Upgrade
One of the most significant announcements in October was Google’s major upgrade to voice search through its new Speech-to-Retrieval (S2R) AI model. This isn’t just an incremental improvement, it’s a fundamental change in how voice search works.
Previously, voice search followed a two-step process: convert speech to text, then search using that text. The S2R model skips the intermediate text conversion step and goes directly from spoken audio to relevant results using vector embeddings.
This makes voice search not just faster, but smarter. It can better understand context, handle accents and variations in speech, and interpret what people actually mean rather than just matching the words they say.
Expect more natural, conversational voice queries to show up in your analytics soon. Users will feel more comfortable asking questions in their natural speaking voice rather than adapting to “keyword-speak“.
What this means for you: Voice search optimisation becomes more important, but it’s not about gaming the system – it’s about understanding how people actually speak:
- Optimise for natural language questions, not just keywords,
- Create content that answers specific, conversational queries,
- Use FAQ sections that mirror how people actually ask questions,
- Consider creating content based on “how people speak” not just “how people type”,
- Long-tail, conversational keywords become even more valuable.
For local businesses, this is particularly important. Voice searchers often ask things like “Where’s the nearest plumber who can come today?” rather than typing “emergency plumber near me.” Your content should match that natural speech.
Mysterious Ranking Volatility Mid-October
Between 15th and 17th October, the SEO community experienced what felt like a core update, except that Google didn’t confirm anything. Rank tracking tools spiked dramatically, showing significant movement across numerous sites and keywords.
Webmasters reported seeing volatility particularly affecting thin-content pages and even some evergreen content. The fluctuations were substantial enough that many assumed Google was rolling out an unannounced core update.
This has become increasingly common in 2025. Google promised “more frequent updates” at the start of the year, but many of these appear to be happening without formal announcements. The SEO community is left tracking volatility patterns and trying to discern what’s actually changing.
What this means for you: We’re now operating in an environment where significant algorithm changes can happen at any time without warning. This means:
- Monitor your rankings and traffic regularly, but don’t obsess over daily changes,
- Keep your site in good shape at all times – you can’t predict when updates will hit,
- Focus on sustainable quality rather than optimisation tactics that might break,
- Build resilience through diverse content, multiple traffic sources, and strong fundamentals,
- Document changes when you see them so you can identify patterns over time.
The days of “stable rankings for months at a time” are behind us. Flexibility and quality are your best defences.
AI Referral Traffic Drops 42.6% Since July
Here’s one reality check that cut through a lot of the AI search hype: research by Kevin Indig showed that despite strong growth earlier in 2025, AI referral traffic dropped 42.6% between July and October.
Let me repeat that: AI referral traffic isn’t just growing slower – it actually declined by nearly half over three months.
This doesn’t mean AI search is dead or dying, but it does suggest the initial surge may have been partly curiosity-driven. Users tried AI search, and many either returned to traditional search for certain queries or reduced their overall AI search usage.
Combined with earlier data showing that ChatGPT users also overwhelmingly use Google (95.3% of ChatGPT users also use Google, compared to only 14.3% of Google users visiting ChatGPT), the picture is starting to become clearer: AI search is a complement, not a replacement.
What AI referral drops mean for you: If you’ve been concerned about AI search destroying traditional search traffic, you can breathe a bit easier, because the data is suggesting:
- Traditional search remains the dominant channel by far,
- AI search may have peaked (for now) in terms of hype and usage,
- Users are becoming more discerning about when to use AI vs. traditional search,
- Your focus should remain on traditional SEO with AI optimisation as a secondary concern.
That said, don’t ignore AI search entirely. For certain types of queries and certain industries, it’s still valuable. But allocate your resources proportionally to actual traffic and business results, not hype.
ChatGPT E-Commerce Traffic Shows Lower Conversion Rates
Adding to the AI reality check, research by Maximilian Kaiser and Christian Schulze published in October found that ChatGPT’s referral traffic to e-commerce websites generates lower conversion rates and revenue per session than Google’s organic and paid search visitors.
This contradicted earlier research from Ahrefs showing higher conversion rates from AI traffic. The difference likely comes down to industry and query type – consultancy and service businesses may see higher-quality AI traffic, whilst e-commerce sees lower quality.
What this means for you: Don’t assume all AI traffic is high-quality. Test and measure for your specific business:
- Track conversion rates by traffic source, including AI platforms,
- Compare revenue per visitor from different sources,
- Assess engagement metrics (time on site, pages viewed, bounce rate),
- Make decisions based on your actual data, not industry averages.
For e-commerce businesses, traditional search (both organic and paid) appears to remain the higher-value channel. For service businesses and consultancies, AI traffic might be more valuable. Your mileage will vary.
Google Serving Issue Causes Brief Disruption
On 3rd October, Google’s Search Status Dashboard showed an ongoing “serving issue” that began around 1:00 PM PDT. This technical problem caused some sites to see unusual blips in traffic and visibility.
Google attributed it to a “data centre issue” and advised against making knee-jerk SEO changes in response to the temporary disruption. The issue was resolved within hours, but it created confusion for website owners monitoring their analytics.
What this means for you: Not every traffic drop is an SEO problem. Before panicking about rankings:
- Check Google’s Search Status Dashboard for known issues,
- Verify your server is responding correctly,
- Look at multiple data sources (Search Console, Analytics, third-party tools),
- Check social media to see if others are reporting similar issues,
- Wait at least 24-48 hours before assuming it’s an algorithm change.
Technical outages happen, even to Google. Document these events in your notes so you can reference them when reviewing historical data.
Microsoft Promotes Copilot Search Integration
Microsoft continued pushing its Copilot AI integration throughout October, positioning it as a bridge between traditional search and AI-generated answers. The company is clearly trying to compete with both Google’s AI features and ChatGPT’s search capabilities.
Copilot Search represents Microsoft’s attempt to blend the best of Bing Search with AI assistance, providing both direct answers and links to sources. Notably, Microsoft stated they don’t plan to make AI Search the default mode, suggesting they understand users still want traditional search for many queries.
What this means for you: Bing shouldn’t be ignored entirely, especially if:
- Your business operates in industries where Bing has stronger market share (enterprise, government),
- You’re already performing well in Bing and want to maintain that visibility,
- Your target audience includes older demographics who may use Bing as their default.
The optimisation principles remain the same across platforms: quality content, proper structure, good user experience. What works for Google generally works for Bing.
Brand Mentions in AI Responses Become More Selective
Research from Profound published in October showed that ChatGPT’s October algorithm update resulted in fewer brand mentions in responses. The number of brands cited per answer dropped from around six or seven to three or four.
This suggests AI platforms are becoming more selective about which sources they cite, potentially favouring higher-authority sources and reducing the total number of citations per response.
Additionally, research from Airops showed that brands are 6.5 times more likely to be cited through third-party sources than their own domains. This means your visibility in AI responses may depend more on being mentioned by authoritative sites than on your own website content.
What this means for you, for AI visibility:
- You need to build genuine authority and brand recognition in your industry,
- Get mentioned and cited by reputable third-party sources,
- Focus on building your brand, not just your website,
- Earn coverage from news sites, industry publications, and authoritative blogs,
- Don’t just optimise your own content, build your reputation across the web.
This aligns with traditional PR and brand-building, which is coming back into focus as AI platforms increasingly favour well-known, authoritative brands.
The Big Picture: Reality Meets Hype
October 2025 was a month where reality started catching up with AI search hype. The story isn’t that AI search failed – it’s that it’s settling into its actual role as a complement to traditional search rather than an immediate replacement.
Key themes from October:
- Voice search is evolving significantly: The S2R model represents a meaningful improvement that will change how people search vocally. Optimise for natural language,
- Unannounced updates are the new normal: Expect significant ranking changes without formal announcements. Build sustainable quality, not brittle optimisations,
- AI traffic is declining from its peak: After strong growth earlier in the year, AI referral traffic has dropped significantly. Traditional search remains dominant,
- AI traffic quality varies by industry: E-commerce sees lower conversion rates from AI traffic, whilst service businesses may see higher quality. Test your specific situation,
- Brand authority matters more: Both for AI citations and traditional search, building genuine authority and third-party mentions is increasingly valuable.
What You Should Do Now
Based on October’s developments:
Optimise for voice search:
- Audit your content for natural language questions,
- Add FAQ sections that mirror spoken queries,
- Create content that answers how, what, why, and where questions conversationally,
- Manually test how your content appears in voice search results,
- Focus on local voice queries if you’re a local business.
Be Prepared for Ongoing Volatility:
- Monitor rankings weekly, not daily,
- Document significant changes with dates,
- Keep a log of when you make changes to your site,
- Build diverse content rather than relying on a few high-ranking pages,
- Maintain quality standards at all times.
Reassess Your AI strategy:
- Review your actual AI referral traffic in Google Analytics,
- Compare conversion rates from AI sources vs. traditional search,
- Adjust resource allocation based on actual business results,
- Don’t abandon AI optimisation, but keep it in proportion,
- Continue to focus on traditional SEO as your primary strategy.
Build Your Brand Authority:
- Invest in PR and genuine media coverage,
- Create content worthy of being cited by others,
- Build relationships with industry publications and journalists,
- Get involved in your industry community,
- Focus on building reputation, not just rankings.
Need Strategic SEO Guidance?
October’s developments highlight how complex modern SEO has become. You need to optimise for traditional search, AI search, voice search, and multiple platforms, all whilst dealing with constant algorithm changes and shifting user behaviour.
If you’re a local business in Farnborough, Hampshire, or the surrounding areas and you’re feeling overwhelmed by these changes, or if you’re simply not sure where to focus your efforts for maximum return, I’m here to help.
I can help you cut through the noise, focus on what actually matters for your business, and develop a sustainable strategy that works across traditional and emerging search channels.
Give me a ring on 01252 692 765 or drop me a message through my contact form. Let’s have a conversation about your business goals and create an SEO strategy that delivers actual results, not just follows the latest trends.
Paul Mackenzie Ross is an SEO consultant based in Farnborough, Hampshire, specialising in helping local businesses improve their online visibility and attract more customers through search engines and AI platforms.