The Top 10 Web Mistakes of 2025
2025 was the year of “ship it now, fix it later” energy. And sure, sometimes that works. But on the web, “later” usually arrives as: slow pages, confused…
2025 was the year of “ship it now, fix it later” energy. And sure, sometimes that works. But on the web, “later” usually arrives as: slow pages, confused users, broken tracking, and a contact form that goes to nobody. Congrats, you built a digital haunted house.
Here are the top 10 web mistakes of 2025, what they look like in the wild, and what to do instead.
If you want related reads, start with:
1) Shipping a homepage hero image that’s basically a short film
If your hero image is 6MB and takes a coffee break before loading, you are not “premium”. You are “buffering”.
Do this instead
Test with PageSpeed Insights and Lighthouse.
Use modern formats like WebP or follow the Lighthouse guidance on AVIF/WebP.
Reality check performance with WebPageTest.
2) Treating Core Web Vitals like a “nice to have”
In 2025, “fast enough on my laptop” is not a performance strategy.
Do this instead
Learn what Google considers “Core Web Vitals” via web.dev’s Vitals guide.
Monitor real user data in Search Console’s Core Web Vitals report.
3) Pop-up overload (aka “Welcome to the site, now please leave”)
Yes, you want leads. No, you should not block the page like you’re guarding national secrets.
Do this instead
Understand what Google flags as bad UX: start with the intrusive interstitials discussion.
Keep your UX clean, especially on mobile. Also, maybe stop with the “spin the wheel” thing. Nobody’s happy.
4) “We have analytics” (and then nothing is actually tracked)
Pageviews are not a measurement plan. They’re a vibe.
Do this instead
Set up events properly using Google’s GA4 docs: Set up events and the recommended events reference.
Mark outcomes as key events using Analytics Help on key events.
5) Accessibility treated as optional, until it isn’t
If your site fails contrast, keyboard nav, and basic form labels… you didn’t build a modern website. You built a frustration generator.
Do this instead
Use the standard: WCAG 2.2.
Quick gut check colors with the WebAIM Contrast Checker.
If you want the “what changed” version, see W3C’s What’s new in WCAG 2.2.
6) Duplicate pages, random canonicals, and URL chaos
Nothing says “we’ve lost control” like three versions of the same page all competing with each other.
Do this instead
Learn canonicalization from Google: What is canonicalization and how to consolidate duplicate URLs.
Keep redirects clean, especially during redesigns.
7) Soft 404s and broken redirects after a redesign
If you “deleted” a page but kept serving a sad message with a 200 status, Google gets… confused. Users too.
Do this instead
Read Google’s guidance on errors: HTTP, network, and DNS errors.
If you want the classic deep cut: Farewell to soft 404s.
Handle permanent moves with MDN’s 301 reference.
8) “We added schema” (but it’s wrong, incomplete, or fantasy)
Structured data is not a wish list. It’s a contract.
Do this instead
Start with Schema.org documentation.
Use Google’s official guidance: Intro to structured data and the Search Gallery.
Validate with Google’s Rich Results Test.
For the AI-era version of this conversation, see:
9) Consent and privacy handled like an afterthought
“Just add a cookie banner plugin” is not a compliance strategy. It’s a coping mechanism.
Do this instead
Understand Google’s approach: Consent mode developer guide and Google Ads Help on consent mode.
10) Security basics skipped because “we’re not a target”
You are a target. Not because you’re famous. Because you exist.
Do this instead
Use the baseline checklist: OWASP Top 10 (2021).
If you want the broader project hub: OWASP Top Ten project page.
A quick “stop doing this” checklist
If you only fix five things:
Pass a basic CWV audit and remove the worst third-party bloat.
Make forms accessible and usable via keyboard.
Replace content-blocking pop-ups with saner CTAs.
Define GA4 events that match real business outcomes.
Patch, prune, and treat security as ongoing.
If you have question, reach out!