SEO Checks · On-Page
Meta descriptions explained: SEO impact & how we check them
Quick answer: A meta description is an HTML tag that summarizes a page's content for search results. The ideal length is 120–155 characters. It doesn't directly affect rankings, but it controls the snippet searchers read before clicking — which controls click-through rate. Our engine runs three checks: missing, too long, and duplicate.
What is a meta description?
A meta description is an HTML element placed in a page's <head> section:
<meta name="description" content="A concise, accurate summary of this page's content, written for the searcher.">
Search engines display this text as the snippet under a page's title and URL in search results — when they choose to use it as-is. It's the pitch that convinces someone to click your result instead of the one above or below it.
Why it matters for SEO
- Click-through rate: A clear, specific description that matches the searcher's intent earns more clicks than a generic or missing one. Higher CTR at a given ranking position is a strong practical signal, even though Google doesn't use the description text itself to rank pages.
- Google sometimes rewrites it: If your description is missing, too generic, or a poor match for the query, Google generates its own snippet from page content. This is often less compelling than a description you'd write yourself.
- AI retrieval context: AI engines that crawl and summarize the web — the systems behind ChatGPT search, Perplexity, and similar tools — use meta descriptions as a quick summary signal when deciding whether a page is relevant to a query and how to describe it.
How our engine checks meta descriptions
We run three distinct checks on every page. Here's exactly what each one tests:
Check 1: meta-description-missing
ID: onpage-meta-description-missing
Severity: Warning
Logic: We check whether the page has a meta description tag with any content. If none exists, the check fails.
Why we flag it: Without a description, Google generates its own snippet by pulling text from the page — often an awkward fragment that doesn't sell the click. Writing your own description gives you control over how the page is presented in search results.
Check 2: meta-description-too-long
ID: onpage-meta-description-too-long
Severity: Warning
Logic: We measure the character length of the description. If it exceeds 160 characters, the check fails.
Why we flag it: Google truncates snippets that run long, usually somewhere around 155–160 characters depending on device and pixel width. A description cut off mid-sentence reads poorly and can lose the point you were making before the truncation.
Check 3: meta-description-duplicate
ID: onpage-meta-description-duplicate
Severity: Warning
Logic: We group every crawled page by its exact meta description text. If the same description text appears on more than one page, every page in that group fails the check.
Why we flag it: A description copied across multiple pages — often from a CMS template default — tells search engines and searchers nothing about what makes each page distinct. It's a common symptom of thin or unfinished pages, and Google is more likely to rewrite duplicated snippets.
How to read your result
When you run a URL through our free checker, each meta description check shows:
- Pass (green): A unique description between roughly 120 and 160 characters is present. No action needed.
- Warning (yellow) — missing: No meta description tag found. Write one.
- Warning (yellow) — too long: The description exceeds 160 characters and will likely be truncated. Trim it.
- Warning (yellow) — duplicate: The same description appears on other pages we crawled. Write a unique one for each page.
How to fix missing or duplicate meta descriptions
We have step-by-step fix guides for every major CMS:
- Fix meta descriptions in WordPress →
- Fix meta descriptions in Shopify →
- Fix meta descriptions in Webflow →
Each guide covers where to set the description in that platform, template defaults that cause duplicates, and character-count tools to check your work.
Meta descriptions and AI visibility
AI engines that answer questions by retrieving and summarizing web content use meta descriptions as one of several signals for understanding what a page covers. A specific, accurate description makes it easier for these systems to match your page to a relevant query and to summarize it correctly when citing it.
For a complete guide on AI citation optimization, see our How to get cited by ChatGPT, Perplexity & Claude guide.
Check your meta descriptions
Our free checker tests all three meta description checks on your page — missing, too long, and duplicate. No signup required.
Check your site free →FAQ
What is the ideal meta description length?
Aim for 120–155 characters. Google typically truncates snippets around 155–160 characters on desktop, though the exact cutoff varies by device and query. Our engine flags anything over 160 characters as too long.
Does a meta description affect rankings?
Not directly. Google has confirmed meta descriptions are not a ranking factor. But a well-written description improves click-through rate, and CTR is an input to how a page performs in practice — more clicks, more signal.
Why does Google rewrite my meta description?
Google rewrites snippets when it judges the on-page description a poor match for the searcher's query, or when the description is missing, too generic, or duplicated across pages. Writing a specific, accurate description for each page reduces how often this happens.
Should every page have a unique meta description?
Yes. Duplicate descriptions across pages waste an opportunity to differentiate each result in the SERP and can signal thin or templated content. Our engine flags any description that appears on more than one crawled page.
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