The invisible tags that control your traffic
Meta tags sit in the <head> of your HTML where no visitor ever sees them. But Google sees them on every crawl, and they directly influence whether your page shows up in search results - and what it looks like when it does.
Most developers get them "mostly right" and move on. The problem is that "mostly right" in meta tags often means "silently broken." Here are the five mistakes we see most often when scanning sites with LintPage.
1. Missing or duplicate title tags
The title tag is the single most important on-page SEO element. It's the blue link in search results. It's the text in the browser tab. And yet we regularly scan sites where pages share the same generic title - or have no title at all.
<!-- Bad: generic title on every page -->
<title>My App</title>
<!-- Good: unique, descriptive title -->
<title>Pricing Plans - My App | Start Free</title>
Every page needs a unique title of 50–60 characters, with the primary keyword near the beginning. If your title gets truncated in search results, the most important words should already be visible.
2. Meta descriptions that are too long, too short, or missing
Google doesn't use meta descriptions as a ranking signal, but they do control the snippet text below your title in search results. A compelling description directly impacts click-through rates.
The sweet spot is 150–160 characters. Too short and you waste valuable preview space. Too long and Google truncates it with an ellipsis - or ignores it entirely and generates its own.
<meta
name="description"
content="Check your site for SEO issues before launch.
Catch NOINDEX tags, broken robots.txt, missing meta tags,
and dozens of other problems in 30 seconds."
/>
Write descriptions that are action-oriented. Tell the searcher what they'll get by clicking. Skip the keyword stuffing - Google can tell.
3. The viewport tag that breaks mobile
If you're building a modern web app, you probably have a viewport meta tag. But we've seen sites with subtly broken configurations that cause layout issues on mobile without any visible errors in dev tools.
<!-- This is correct -->
<meta
name="viewport"
content="width=device-width, initial-scale=1"
/>
<!-- This blocks pinch-to-zoom (accessibility issue) -->
<meta
name="viewport"
content="width=device-width, initial-scale=1,
maximum-scale=1, user-scalable=no"
/>
The user-scalable=no and maximum-scale=1 properties are accessibility violations. They prevent users from zooming in, which is a WCAG failure. Google's mobile-friendliness checks flag this.
4. Missing canonical URL
Canonical URLs tell search engines which version of a page is the "real" one. Without them, Google might index your page at multiple URLs - splitting your ranking signals across duplicates.
This is especially common with sites that have trailing slashes, query parameters, or www vs non-www versions:
<!-- Without canonical, all of these compete with each other -->
https://example.com/pricing https://example.com/pricing/
https://example.com/pricing?ref=nav https://www.example.com/pricing
<!-- Fix: add a canonical tag -->
<link
rel="canonical"
href="https://example.com/pricing"
/>
Set a canonical URL on every page. Your framework probably has a built-in way to do this - in Next.js, use the alternates.canonical metadata field.
5. Accidental noindex in production
This is the one that costs real traffic. A noindex robots meta tag tells Google to drop your page from the index entirely. It's common on staging environments and often makes it to production by accident.
<!-- This single line removes your page from Google -->
<meta
name="robots"
content="noindex, nofollow"
/>
We built LintPage specifically because this happened to us. A noindex tag shipped to production and went unnoticed for 47 days. By the time we caught it, our organic traffic had dropped to zero.
The fix is simple: check for noindex before every deploy. That's exactly what the LintPage Meta Tag Checker does - paste your URL, and it flags robots directives in seconds.
Don't wait for traffic to drop
These five mistakes are common because they're invisible. You can't spot a missing meta description by looking at your site. You need to actively check for them - either manually in the HTML source, or automatically with a tool.
Run your site through the Meta Tag Checker now. It takes 10 seconds and catches all five of these issues (plus more). If you want the full picture - all 60 SEO checks at once - sign up for a free LintPage account.