NEWS
Google’s John Mueller Speaks on SEO for Dark Mode Websites

Google’s John Mueller recently discussed whether or not there are specific SEO considerations for websites with dark mode settings.
This topic came up during the Google Webmaster Central hangout on October 18. With dark mode settings for websites growing in popularity, it was only a matter of time before Mueller was asked about this.
Here is the question that was submitted:
“We want to implement a dark mode for our website. Do we have to consider anything in relation to SEO?”
Mueller begins his response by saying he’s personally a fan of the dark mode trend. He thinks it’s cool and not something he expected users would have ever wanted from websites.
When it comes to SEO, there are no problems with using dark mode. There are also no special considerations. Dark mode is handled by CSS, and the way CSS is implemented on a website doesn’t affect how Google crawls content for indexing.
Dark Mode as a Ranking Factor?
Mueller made sure to clarify that dark mode is not a ranking factor. Though he lightheartedly entertained the idea that perhaps it could be one day.
If dark mode becomes widely implemented on websites, Mueller said it might make sense to serve dark mode sites to users if the phone they’re searching with is also set to dark mode.
To be clear, Mueller says he doubts that will actually happen, but it’s still interesting to think about.
Hear Mueller’s full response in the video below, starting at the 28:39 mark:
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“I think this is totally cool. I really like the trend to ‘dark mode’ websites or ‘dark mode’ apps in general. It’s something that I wouldn’t have expected a few years back, that people would want to have kind of this dark mode/light mode setup.
With regards to SEO that’s absolutely not a problem. Usually people implement this using CSS, and the way you implement things in CSS doesn’t affect how we would pick things up for indexing. So go for it, I think that’s really awesome.
I don’t think dark mode would be a ranking factor. So, maybe, at some point in the future if dark mode is really, really popular then maybe we would need to highlight dark mode sites in search when people have their phone set up to dark mode. But I don’t know if that would actually happen, or if it will really go that far.”
NEWS
Google December Product Reviews Update Affects More Than English Language Sites? via @sejournal, @martinibuster
Google’s Product Reviews update was announced to be rolling out to the English language. No mention was made as to if or when it would roll out to other languages. Mueller answered a question as to whether it is rolling out to other languages.
Google December 2021 Product Reviews Update
On December 1, 2021, Google announced on Twitter that a Product Review update would be rolling out that would focus on English language web pages.
Our December 2021 product reviews update is now rolling out for English-language pages. It will take about three weeks to complete. We have also extended our advice for product review creators: https://t.co/N4rjJWoaqE
— Google Search Central (@googlesearchc) December 1, 2021
The focus of the update was for improving the quality of reviews shown in Google search, specifically targeting review sites.
A Googler tweeted a description of the kinds of sites that would be targeted for demotion in the search rankings:
“Mainly relevant to sites that post articles reviewing products.
Think of sites like “best TVs under $200″.com.
Goal is to improve the quality and usefulness of reviews we show users.”
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Google also published a blog post with more guidance on the product review update that introduced two new best practices that Google’s algorithm would be looking for.
The first best practice was a requirement of evidence that a product was actually handled and reviewed.
The second best practice was to provide links to more than one place that a user could purchase the product.
The Twitter announcement stated that it was rolling out to English language websites. The blog post did not mention what languages it was rolling out to nor did the blog post specify that the product review update was limited to the English language.
Google’s Mueller Thinking About Product Reviews Update
Product Review Update Targets More Languages?
The person asking the question was rightly under the impression that the product review update only affected English language search results.
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But he asserted that he was seeing search volatility in the German language that appears to be related to Google’s December 2021 Product Review Update.
This is his question:
“I was seeing some movements in German search as well.
So I was wondering if there could also be an effect on websites in other languages by this product reviews update… because we had lots of movement and volatility in the last weeks.
…My question is, is it possible that the product reviews update affects other sites as well?”
John Mueller answered:
“I don’t know… like other languages?
My assumption was this was global and and across all languages.
But I don’t know what we announced in the blog post specifically.
But usually we try to push the engineering team to make a decision on that so that we can document it properly in the blog post.
I don’t know if that happened with the product reviews update. I don’t recall the complete blog post.
But it’s… from my point of view it seems like something that we could be doing in multiple languages and wouldn’t be tied to English.
And even if it were English initially, it feels like something that is relevant across the board, and we should try to find ways to roll that out to other languages over time as well.
So I’m not particularly surprised that you see changes in Germany.
But I also don’t know what we actually announced with regards to the locations and languages that are involved.”
Does Product Reviews Update Affect More Languages?
While the tweeted announcement specified that the product reviews update was limited to the English language the official blog post did not mention any such limitations.
Google’s John Mueller offered his opinion that the product reviews update is something that Google could do in multiple languages.
One must wonder if the tweet was meant to communicate that the update was rolling out first in English and subsequently to other languages.
It’s unclear if the product reviews update was rolled out globally to more languages. Hopefully Google will clarify this soon.
Citations
Google Blog Post About Product Reviews Update
Product reviews update and your site
Google’s New Product Reviews Guidelines
Write high quality product reviews
John Mueller Discusses If Product Reviews Update Is Global
Watch Mueller answer the question at the 14:00 Minute Mark
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