# Lighthouse SEO monitoring Would you notice if slow pages were killing your rankings? These issues creep up gradually - by the time you see it, traffic's dropped. We run daily Lighthouse checks (Google's own metrics) and alert you the moment something regresses. [ Start monitoring ](https://ohdear.app/register) 10 day free trial No credit card required ## Google judges your site on these scores Core Web Vitals are a ranking factor Google doesn't just look at your content - it measures how fast your site loads, how accessible it is, and whether you follow SEO best practices. These metrics directly affect your search rankings. A slow site gets pushed down in search results. Missing alt text on images hurts your SEO score. Poor mobile performance loses you mobile traffic. The problem? These scores degrade over time. A single 23MB PNG uploaded to your CMS can tank your performance score overnight. An innocent code change can break accessibility. You won't know until you check - or until Google drops your rankings. We check daily and alert you the moment scores drop, so you can fix issues before they hurt your search visibility. Performance impacts your bottom line A 1-second delay in page load can decrease conversions by 7% (Akamai) 53% of mobile users abandon sites taking over 3 seconds to load (Google) Google uses Core Web Vitals as a ranking factor since June 2021 Sites in the top 10% for performance get 2.5x more organic traffic ## Stop running Lighthouse manually Catch regressions before they cost you traffic Most teams check Lighthouse scores one of three ways: opening Chrome DevTools after a deploy, running PageSpeed Insights when something feels off, or hiring SEO consultants to audit quarterly. The problem? None of these catch regressions as they happen. You only find out when someone remembers to check - or when you notice traffic dropping. By then, slow performance or accessibility issues have already hurt your rankings for days or weeks. Google's already pushed you down in search results. We run checks daily and alert you within minutes of a score dropping. Fix issues while they're fresh, before they impact your search visibility or conversions. ## Choose how we let you know if your Lighthouse scores in- or decrease Receive our notifications on your preferred platform. Via email, SMS, Slack, Discord, Opsgenie, PagerDuty, Microsoft Teams, Pushover, ntfy, webhooks,… we can notify you wherever your team is active. Take notifications to the next level: only notify who needs notifying by assigning responsibilities to different team members. ## Know exactly what to fix first Lighthouse shows the impact of each improvement Lighthouse doesn't just tell you scores are low - it gives you specific, actionable recommendations with estimated time savings for each fix. For example: "Reduce unused JavaScript: save 450KB (0.8s faster)" or "Properly size images: save 2.1MB (1.2s faster)." You'll know exactly which improvements have the biggest impact on performance. This means you can prioritize fixes that matter most: tackle the 2.1MB image problem before optimizing font loading that only saves 0.1s. No guesswork, no wasted effort on low-impact changes. Every recommendation includes file names, line numbers, and technical details your developers need to fix the issue quickly. ## Track improvements over time See exactly when scores changed and why A single Lighthouse check tells you where you are right now. Historical tracking shows you where you've been - and more importantly, what caused scores to change. When your performance score drops from 95 to 78, you can pinpoint the exact day it happened and correlate it with deploys, content updates, or third-party script changes. No more guessing what broke your scores. When you implement fixes, you'll see scores improve in the next check. Track the impact of optimizations over weeks and months - prove to stakeholders that performance work delivers real results. Historical data also reveals gradual degradation. Scores don't usually tank overnight - they slowly decline as you add features, content, and complexity. Daily monitoring catches these trends before they become serious problems. ## Who should use Lighthouse monitoring? Teams that care about search rankings and user experience **E-commerce teams** where a 1-second slowdown means lost sales. Performance regressions directly impact conversion rates and revenue. **Marketing teams** driving traffic through SEO and paid ads. If your site ranks well but loads slowly, you're paying for traffic that bounces before converting. **Product teams shipping frequently** who need to catch performance regressions before they reach production. A single deploy can tank your Lighthouse scores. **Agencies managing client sites** who need to prove they're maintaining performance and accessibility standards. Automated reports show you're staying on top of Core Web Vitals. **Anyone with a public website** who wants Google to rank them higher. Core Web Vitals are a ranking factor - monitoring them is monitoring your search visibility. ## What Lighthouse checks (and what it doesn't) Understanding the scope Lighthouse excels at measuring technical performance, accessibility compliance, SEO fundamentals, and best practices. It simulates a mobile device loading your site and measures exactly what Google's ranking algorithm cares about. What it checks: page load speed, Core Web Vitals (LCP, FID, CLS), image optimization, JavaScript bundle size, accessibility issues (screen reader compatibility, color contrast, alt text), SEO basics (meta tags, structured data, mobile-friendliness), HTTPS usage, and modern web best practices. What it doesn't check: content quality, keyword optimization, backlinks, or anything requiring human judgment. Lighthouse measures the technical foundation that makes good content discoverable and usable - but it won't tell you if your content is compelling or well-written. Think of it this way: Lighthouse ensures Google can find, crawl, and rank your site. Content strategy ensures people want to read it once they arrive. ## Stop worrying, start monitoring Start a no-strings-attached 10-day free trial. You're all set in less than a minute. (No credit card needed.) Not convinced yet? Need help? Get in touch via . ## Really into the nitty gritty details? Want to get into the nitty gritty details of our monitoring? Have a look at our documentation. ## Frequently asked questions ### Does Oh Dear run Google Lighthouse audits on a schedule? Yes. Oh Dear runs Lighthouse against your pages on a schedule and tracks performance, SEO, accessibility, and best-practice scores over time. When a score drops below the threshold you set, we'll alert you, so a regression shows up as a trend break, not a surprise. ### What does Oh Dear's Lighthouse monitoring score? The four Lighthouse categories Google cares about: performance, accessibility, best practices, and SEO, each scored out of 100. On top of the scores, we track the underlying metrics like First Contentful Paint, so you can watch the Core Web Vitals trend, not just the headline number. ### Will Oh Dear alert me when a Lighthouse score drops? Yes. Set a minimum score for each category (and a ceiling for individual metrics), and we'll alert you when a page falls below it. To keep the noise down, alerts only fire after a couple of runs in a row stay below your threshold, so a one-off blip won't wake you. ### How is this different from running Lighthouse myself in Chrome? Running Lighthouse in Chrome DevTools gives you a snapshot the moment you click. Oh Dear runs it for you on a schedule, keeps the history so you can see the trend over weeks, and tells you when a deploy quietly tanks your SEO or performance score, without you having to remember to check. [See all other FAQ items →](https://ohdear.app/docs/faq) ## Start monitoring instantly Start a no-strings-attached 10-day free trial. You're all set in less than a minute. (No credit card needed.) Not convinced yet? Need help? Get in touch via .