A meta description is the short summary of a page that search engines can show under its title in results. It is not a ranking factor, Google rewrites roughly two out of three of them, and it is still worth writing carefully, because when yours does display it is the ad copy deciding whether the searcher clicks you or the result below you. This post covers what the tag is, the on-record ranking reality, the rewrite studies and what actually raises your keep rate, the display limits versus the limits that matter, a writing workflow, four formulas with a real before and after, and the edge cases that catch production sites.
The short version
- The meta description is the snippet under your title in search results.
- It does not affect rankings, on Google's own record since 2009. It affects clicks.
- Studies measure Google rewriting 62% to 71% of descriptions, per query.
- Mobile shows about 120 characters, desktop about 155. Truncation is display, not a penalty.
- Lead with the strongest claim, use the searcher's words, end with the next step.
What the tag is and where it lives
The meta description sits in the head of the page, invisible to visitors but readable by anything that parses HTML:
<head>
<title>Your Page Title | Brand</title>
<meta name="description" content="Your summary of the page, written like ad copy, with the key claim inside the first 120 characters.">
</head>Every mainstream platform exposes a field for it. WordPress through Yoast or Rank Math, Shopify under the search engine listing preview, Wix and Squarespace in page-level SEO settings. Finding the field is never the hard part. Writing something a stranger would click is.
It is not a ranking factor, and you should write it anyway
Google stated in 2009 that the meta description is not used in ranking, and its search team has restated the position many times since. No amount of keyword placement in the description moves a page up. The honest chain of value runs differently: position determines how many people see your listing, the title and snippet determine how many choose it, and the visits are the point of ranking at all. A page sitting fourth that out-pitches the results above it collects clicks a ranking model never awarded it. That is the entire case for the tag, and it is enough. Write descriptions for pages where the click is worth winning, and spend no effort stuffing keywords into them for rankings that will never come.
Google rewrites most of them, and the studies agree on the rate
Google has said for years that snippets are built per query, and the measurement studies show how far that goes in practice. The two most cited put the rewrite rate between six and seven out of ten:
| Study | What it measured | Rewrite rate |
|---|---|---|
| Portent | Desktop results | 68% |
| Portent | Mobile results | 71% |
| Ahrefs | 20,000 keywords, top-ranking pages | 62.78% |
The word rewrite undersells what happens. Google is not editing your sentence; it is ignoring it and quoting a passage from the page that matches the query in front of it. The same URL can show five different snippets for five different searches, which no single description could ever cover. What raises your keep rate is alignment: descriptions that answer the page's main query in the words searchers type get used far more often, especially for the head query the page targets. Write for that query, accept that long-tail searches will get Google's own excerpt, and make sure your page text can survive being quoted, because it will be.
The length that displays and the length that matters
Truncation happens by pixel width, not character count. On desktop the cutoff lands around 155 to 160 characters; on mobile it is closer to 120. Nothing bad happens to a longer description beyond the ellipsis: there is no penalty, no ranking effect, and engines read the full attribute. That changes how you write more than how much. The claim that earns the click belongs in the first 120 characters, the only part guaranteed to render everywhere. Past 155, extra text is for machines and for the occasional query where Google bolds a matching phrase from deep in your snippet. A 280-character description with its pitch up front beats a 150-character one that spends its opening on a warm-up clause.
How to write one that earns the click
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Match the intent of the search
A buying query wants price, proof, or an offer. An informational query wants a promise of the answer. Write to what the searcher came for, not what you want to say.
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Lead with the strongest claim
The first 120 characters are the only part guaranteed to display. Put the reason to click there.
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Use the searcher's words
Google bolds terms that match the query, which makes your listing visually louder. Matching the query's language is also what keeps Google from swapping in its own excerpt.
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Be specific where honest specifics exist
"Includes 4 formulas and real examples" beats "everything you need to know" in every comparison we have run. Specifics read as substance; superlatives read as filler.
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End with the next step
A quiet call to action, like "See the pricing" or "Read the checklist," finishes the pitch. Skip the shouting.
Four formulas and one real before and after
- Problem, solution, next step. "Struggling with [problem]? [What the page delivers]. [CTA]."
- What, why, next step. "Learn [what] to [outcome]. Covers [key points]. [CTA]."
- Result, proof, next step. "Get [result] with [service]. [Honest proof point]. [CTA]."
- Question, answer, next step. "What is [topic]? [One-sentence answer]. [What else the page adds]. [CTA]."
- Before. "Buy headphones from our store. We sell many types of headphones for all your listening needs." It could describe ten thousand stores and sells none of them.
- After. "Shop bestselling wireless headphones with 40-hour battery life. Free shipping over $50, 30-day returns. Find your pair." Three concrete reasons to click and a next step, with everything essential inside the first 120 characters.
Our own practice on money pages: the description opens with an entity-defining sentence, the shape "Egochi is a [category] that [what it does]," before the claim and the call to action. That sentence shape is what AI engines quote, and search snippets are only half the reason to write it. The other half is that we repeat the same definition in the page's opening paragraph, because AI systems and featured snippets lift from body copy, not from meta tags. A description that has no matching sentence on the page is a promise with no witness.
Mistakes and edge cases that catch production sites
- Leaving it blank lets Google improvise your ad copy from whatever text it finds, including cookie notices and navigation labels.
- One description on dozens of pages makes near-identical listings compete and all but guarantees rewrites across the set.
- Unescaped double quotes inside the content attribute end the attribute early, silently truncating the snippet in the HTML itself. Use single quotes in the copy or escape them.
- Claims the page does not keep earn the click and lose it seconds later. The bounce costs more than the visit was worth.
- Paginated and faceted pages need distinct descriptions or none at all. For page 2 and beyond, letting Google generate the snippet is often the honest choice.
- Keyword lists instead of sentences read as spam in the results and get replaced almost every time.
To find the problems at scale, crawl the site with Screaming Frog for missing and duplicate descriptions, then sort Search Console by pages with high impressions and weak click-through rate. Those pages are where a rewritten snippet pays for the hour it takes. Check what Google currently displays for your top queries before rewriting, since the snippet you are unhappy with may not be yours at all.
Where the meta description fits
The description is one half of your search listing, next to the title tag, which is the half that does carry ranking weight. Both belong to the same on-page SEO discipline as headings, internal links, and alt text: say what the content actually is, front-load what matters, and let honest specifics do the selling.
Questions people ask about meta descriptions
Are meta descriptions a ranking factor?
No. Google said so plainly back in 2009 and has repeated it since. The description does not move rankings in either direction. Its job is the click: a snippet that wins more clicks than its position normally earns is doing real work, just not through the ranking algorithm.
How long should a meta description be?
Write the part that must display in the first 120 characters, since that is roughly what mobile shows, and keep the full snippet under about 155 for desktop. Longer descriptions are not penalized; the tail simply gets cut on screen while engines still read it.
Why does Google change my meta description?
Google builds snippets per query, and when it thinks a passage from your page matches the search better than your description, it uses the passage. Studies measure this happening on roughly two thirds of results. Descriptions that use the words searchers use get kept more often.
What happens if I leave the meta description empty?
Google generates one by pulling whatever page text seems to match the query. Sometimes that works fine. Often it clips a sentence mid-thought and your listing reads like an accident. Writing your own at least sets the default for the queries that matter most.
Can I use the same meta description on several pages?
No. Duplicate descriptions waste the chance to sell each page on its own terms, and they are close to a guarantee that Google writes its own instead. Every page that matters deserves its own snippet; pages that do not matter enough to write for can be left to Google.
Do meta descriptions matter for AI search?
Indirectly. AI engines quote from page content far more than from meta tags, but a description written as a clean entity-defining sentence tends to mirror the sentence shape those engines lift from pages. Put the same definition in your opening paragraph, where AI systems actually read it.
