モバイルフレンドリーでSEO対策【2024最新】スマホユーザー獲得で検索上位を狙う
We now live in a mobile-first internet age. Website traffic is dominated by mobile devices, and Google has adopted mobile-first indexing, meaning the mobile version of a site is treated as the primary index. That is why mobile friendliness is a required condition for SEO today.
Based on the latest 2024 perspective, this article explains mobile friendliness from the basics to practical SEO techniques and future trends. It covers everything you need to improve rankings, including Google’s mobile-friendly evaluation, Core Web Vitals, responsive web design, AMP, and page-speed optimization. It also looks ahead to trends such as voice search, video SEO, and AR/VR.
Make your site mobile-friendly now, capture smartphone users, and grow your business.
Mobile-friendly basics: think from the perspective of smartphone users
What is mobile friendliness? Its impact on SEO
A mobile-friendly website is one that can be viewed comfortably on smartphones, tablets, and other mobile devices. It needs to be optimized so mobile users can operate and read it without stress, including text size, button placement, and loading speed.
Its effect on SEO is large, and Google has clearly stated that mobile friendliness is a ranking factor. In other words, a site that is not mobile-friendly is more likely to lose rankings and miss opportunities to be discovered by users.
モバイル版のページを用意することは、コンテンツを Google の検索結果に表示させるための要件ではありませんが、非常に強く推奨されています。
モバイルサイトとモバイルファースト インデックスに関するおすすめの方法
Understanding how smartphone users behave
Mobile users differ from desktop users in both how they access information and the kind of information they want. For example, they often search while moving around and want answers immediately. That is why concise information, smooth operability, and fast loading are especially important on mobile sites.
By meeting those needs, you can improve user experience and raise conversion rates.
What does Google consider mobile-friendly?
When Google evaluates whether a site is mobile-friendly, it looks at many elements. Major examples include responsive web design, appropriate viewport settings, fast page speed, and content optimized for mobile devices.
When a site satisfies these elements, Google is more likely to evaluate it highly, which can lead to stronger rankings.
The drawbacks of a site that is not mobile-friendly
A site that is not mobile-friendly harms not only SEO but also user experience and conversion. In addition to lower rankings, users are likely to leave a site quickly if it is hard to view on mobile, which leads to poorer conversion performance. To avoid holding back business growth, mobile friendliness is essential.
Has the mobile-friendly test ended? What actually changed and what to use instead
The former Mobile-Friendly Test tool was a simple tool that checked a URL directly, but it has been folded into the URL Inspection features around Google Search Console workflows.
Because of that, the claim that the mobile-friendly test has ended is partly misleading. The most trustworthy alternative is the integrated URL Inspection workflow, and if you combine it with PageSpeed Insights, you can also gain a deeper performance analysis.
Other mobile-friendly testing tools: three recommendations
In addition to Google’s tools, there are several other mobile-related testing tools. Typical examples include the following.
GTmetrix
WebPageTest
Pingdom Website Speed Test
These tools help not only by measuring page speed but also by suggesting improvements, which makes them useful for SEO work.
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速度改善策を1分で把握！GTmetrixの使い方とチェックポイント解説
Why it helps to check mobile friendliness with multiple tools
It is a good idea to use multiple tools when checking mobile friendliness. Because each tool uses different evaluation criteria and analysis items, using several tools helps you identify problems from multiple angles.
Practical SEO work for building a mobile-friendly site
Achieve a fully mobile-friendly site with responsive web design
Responsive web design is a design approach in which the layout of a site automatically adapts to the screen size. It creates the best possible display across desktops, tablets, and smartphones and gives users a comfortable browsing experience.
It also removes the need to create a separate mobile site and can reduce management cost. By using CSS media queries, you can apply the most appropriate styles to each device type.
How to adapt to mobile-first indexing
Google uses mobile-first indexing, meaning the mobile version of a site is treated as the primary version for indexing and ranking. In practice, that means the content on the mobile version has a major effect on search results.
If the mobile and desktop versions differ, you need to prioritize improving and enriching the mobile version. Structured data and metadata should also be consistent across mobile and desktop so Googlebot can crawl and index the information correctly.
Page-speed optimization: why Core Web Vitals matter and how to improve them
Page speed is a critical element of mobile friendliness. A slow page drives users away and harms SEO.
Core Web Vitals, proposed by Google, are user-experience-focused metrics such as LCP, FID, and CLS, and they act as a guide for page-speed improvement. By applying measures such as image optimization, removing unnecessary JavaScript, and using browser caching, you can improve Core Web Vitals scores.
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Core Web VitalsでSEO＆UX向上【2024最新】サイト表示速度を劇的改善ガイド
Mobile-friendly design: points that improve user experience
Mobile-friendly design is essential for improving user experience. Think about tap-friendly button sizes, readable font sizes, and layouts that are easy to scroll through, then optimize the site for smartphone use.
Mobile users usually want quick access to the information they need, so clear and simple navigation design is also important.
The benefits and drawbacks of AMP
AMP is a framework for displaying mobile pages quickly. By adopting AMP, you can dramatically improve page loading speed and enhance user experience.
However, AMP also has constraints, including restrictions on JavaScript, so implementation can require extra care. Compare the SEO benefits against the implementation cost and decide whether adoption makes sense for your site.
HTTPS is essential for trust and safety
HTTPS is a security protocol that encrypts communication between a website and its users. Moving to HTTPS is one of Google’s ranking signals, and it has also become essential because users are increasingly conscious of security.
Google は過去数か月にわたり、暗号化された安全な接続をサイトで使用していることを検索のランキング アルゴリズムのシグナルとして考慮するテストを実施してきました。このテストで十分な結果が得られたため、Google はランキング シグナルとして HTTPS を使用することにしました。
ランキング シグナルとしての HTTPS
With an SSL certificate, moving to HTTPS is comparatively straightforward.
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SSLとTLSとは？暗号化で情報を守る仕組みとメリット
Techniques for ranking higher in mobile SEO
Keyword selection and placement that matter in mobile SEO
Mobile users may search with different keywords than desktop users. In mobile SEO, it is important to research the terms mobile users actually use and choose the right ones.
By placing those keywords appropriately in title tags, meta descriptions, headings, and body text, you can communicate the content correctly to search engines and help improve rankings.
Use local SEO to target nearby users
For businesses with physical locations, local SEO is extremely important. By registering in Google Business Profile and keeping NAP information consistent, you can improve your ability to attract nearby users.
Because mobile users often search for information around their current location, local SEO is closely tied to mobile SEO.
Use content SEO to attract smartphone users
Mobile users often search while on the move or during short breaks, so they need content that is concise, easy to understand, and easy to read. By creating content optimized for mobile use, you can increase engagement and improve SEO performance.
Use bullet points, short paragraphs, and images or video where appropriate to create content that works well on mobile devices.
Optimize mobile UI and UX to reduce bounce
Mobile UI and UX have a major influence on bounce rate. Optimize the site so users can browse without stress by focusing on intuitive interfaces, readable font sizes, smooth scrolling, and buttons that are easy to tap.
Reducing bounce rate contributes not only to SEO but also to stronger conversion performance.
Analyze mobile SEO with Google Search Console
Google Search Console is a free tool for analyzing website performance. By using mobile usability reports and related data, you can identify mobile-friendliness problems and improve them.
You can also review search queries, click-through rate, and impressions and use those insights to improve your mobile SEO strategy.
Future mobile SEO trends: what will matter in 2025?
Core Web Vitals and page experience will matter even more
Google is putting even more emphasis on user experience, and Core Web Vitals are central to that. They already influence rankings, but they are likely to become even more important.
Elements such as interactivity and visual stability may be evaluated in greater detail. Page-experience optimization is also likely to expand beyond mobile and matter on desktop as well.
Complete adoption of mobile-first indexing and the need to optimize mobile content
Google has already adopted mobile-first indexing, but some sites have still not fully adapted. In the future, full support for mobile-first indexing will become unavoidable, and the quality of mobile content will have an even larger impact on SEO.
Sites that have content only on mobile or low-quality content on mobile versions may see negative effects on rankings.
Voice search and video search optimization will become essential
As smart speakers and smartphones become even more common, voice search continues to grow. At the same time, video consumption is expanding, and video search is becoming more important.
To respond to these searches, it becomes important to create content written in natural language, optimize metadata for video, and provide transcripts.
AI-driven personalization and the content strategies needed to respond
As AI evolves, personalization in search results is likely to become more advanced. Because results will be tuned more closely to user behavior and interests, content strategies aimed at specific target segments will become more important.
By understanding search intent accurately and providing information that fits user needs, you can aim for stronger positions in search results.
More immersive mobile experiences through AR and VR
AR and VR are already being used in areas such as ecommerce product experiences, sightseeing guidance, and games. As these technologies connect more deeply with mobile, they will make it possible to offer more immersive user experiences.
For example, AR can let users place products virtually, and VR can let them look around a store in 360 degrees. These experiences can raise engagement and improve conversion rates.
Summary: the key points of mobile-friendly SEO success
Mobile friendliness has already become an essential element of SEO.
By adopting responsive web design, optimizing page speed, and creating mobile-friendly content, you can provide a comfortable experience for mobile users and improve SEO results. By using tools such as Google’s mobile-focused diagnostics and Search Console while keeping up with new trends, you can succeed in mobile SEO.
Investing in mobile friendliness should make a major contribution to future business growth.
Appendix: mobile-friendly tools
PageSpeed Insights:
ページ速度の計測と改善点の提案
GTmetrix:
ページ速度の分析とパフォーマンス改善のためのアドバイス
WebPageTest:
詳細なパフォーマンス分析とボトルネックの特定
Pingdom Website Speed Test:
ウェブサイトの速度テストとパフォーマンス監視
Google Search Console:
ウェブサイトのパフォーマンス監視とSEO対策
Google Analytics:
ウェブサイトのアクセス状況分析
This appendix lists tools that are useful when putting mobile-friendly measures into practice. By understanding what each tool does and how to use it, you can work on SEO more effectively.