How to Track 404 Errors for Agencies
Your client just called. They tried visiting a landing page you built six months ago, and they got a 404 error. They are not happy. This scenario plays out across agencies every day, and it is costing you renewals.
Why 404 Errors Matters for Agencies
Client trust is on the line. When a client’s potential customer hits a broken link, they do not blame the website. They blame the agency that built it. A single 404 error on a high-traffic page can mean lost leads and damaged credibility.
SEO rankings take a hit. Googlebot crawling a site full of 404 errors gets frustrated. It stops indexing pages, and your client’s search rankings drop. Agencies managing SEO contracts need to treat 404 errors as a core KPI.
It is an easy win for retention. Most agencies struggle to show value beyond monthly reports. Proactively catching 404 errors before clients notice demonstrates proactive stewardship. It is a small thing that makes a big difference.
Competitive differentiation. If your agency monitors 404 errors automatically while competitors ignore it, you look more professional. It is a simple metric that separates hands-on managers from passive vendors.
How to Check in GA4
Open Google Analytics 4 and navigate to the Explore section. Create a new Free Form report. Add “Page location” as a dimension and “Views” as a metric. Apply a filter where page location contains “404” or “not-found”.
Set up a custom event for “not_found” by editing your GA4 configuration. Tag every 404 page view as a specific event. This gives you cleaner data than searching through page URLs.
Run this report weekly. Export the data and compare week-over-week. Any sudden spikes mean something broke, likely from a recent deployment or content change.
The Easier Way
ClawAnalytics makes 404 tracking effortless for agencies managing multiple client sites. Instead of logging into each GA4 property, you see all 404 errors across every client in one dashboard.
Example questions ClawAnalytics answers instantly:
- Which client site had the most 404 errors this month
- Did our last deployment cause any new broken links
- Which specific pages are generating the most error traffic
You can set up alerts that notify you the moment a 404 error appears. No more waiting for client complaints. You fix it before they even know there was a problem.
Quick Wins
Run a site audit using a tool like Screaming Frog. Export all broken links and categorize them by client. Create a shared spreadsheet tracking each URL, the source link, and when it was fixed.
Automate weekly 404 reports using ClawAnalytics. Schedule them to land in your project management tool every Monday morning. Review during your weekly standup and assign fixes before they impact clients.
Set up 301 redirects for any retired pages. Do not just let them 404. Redirect old campaign pages to relevant current content. This preserves any link equity those pages built over time.
Add 404 monitoring to your agency onboarding checklist. Every new client site gets 404 tracking configured in the first week. It takes ten minutes and pays dividends all year long.
