The era of desktop-first search is over; mobile-first is now the universal rule. Your mobile site is now the primary version search engines use to evaluate your entire domain’s relevance and authority. A weak mobile experience directly undermines your SEO performance—even if your desktop site is flawless. To succeed in 2025, you must make mobile usability your top SEO priority.

Never strip away critical information from your mobile page—match your desktop content exactly. Avoid hiding important text, images, or navigation elements behind menus or 横浜市のSEO対策会社 tabs that don’t load properly on mobile. If your users can view it, search engines must be able to crawl and index it too. Every piece of content visible on desktop must be present and fully functional on mobile to preserve your ranking power.

Speed isn’t optional—it’s a core ranking factor. Users on mobile devices expect fast load times, and search engines reward sites that deliver them. JS blocking, and serve assets via CDN. Aim for a load time under two seconds. Tools like Google’s PageSpeed Insights and Lighthouse can help you identify and fix bottlenecks.

Your site must fluidly adapt to every screen size without compromise. Your site must adapt seamlessly to all screen sizes. Don’t maintain m.domain.com or device-specific versions unless you have no other choice. Search engines prefer a unified structure that works everywhere without redirects or duplicate content risks.

Mobile usability is not a nice-to-have—it’s a ranking requirement. Make tap targets at least 48x48 pixels with adequate padding to prevent mis-taps. Text should be readable without zooming. Long forms kill conversions—streamline them for mobile users. If users can’t access your content in one tap, you’re violating Google’s mobile usability guidelines.

Search engines rely on it to understand context and serve rich results. Structured data turns basic pages into rich, clickable search results. If you want to appear in carousels or snippets, schema markup is your only path.

Regularly test your mobile experience. Use Google Search Console’s mobile usability reports to catch errors like text too small to read, clickable elements too close together, or content wider than the screen. Address these issues immediately. Also, monitor your Core Web Vitals—Largest Contentful Paint, First Input Delay, and Cumulative Layout Shift—as they are direct ranking factors.

Modern mobile performance still demands attention—even after AMP’s decline. Accelerated Mobile Pages are no longer required, but fast, lightweight pages still perform well. Outdated formats and blocking styles are SEO liabilities. App content indexed via Search Console can outrank your site for app-relevant queries.

At its core, mobile-first is a philosophy of putting users first. Design, optimize, and test for them—every decision must serve mobile. If your site serves them well, search engines will recognize that and reward you with higher visibility. Focus on speed, simplicity, and substance, and your mobile site will become your strongest asset.