What Is a Meta Description?
A meta description is the short summary shown under a page's title in search results. Pixel width, rewrite behavior, and a real example.
A meta description is the short summary shown under a page’s title in search results. It doesn’t directly affect rankings, but it directly affects whether someone clicks, and Google rewrites it more often than most people realize.
Why the meta description matters
Think of it as a mini pitch for the click. The common oversimplification worth correcting: it’s not a fixed 155-160 character limit, Google truncates by pixel width, roughly 920 pixels on desktop and around 680 on mobile, so a description packed with wide capital letters gets cut off sooner than one written in lowercase. Google also rewrites meta descriptions on a large share of pages it analyzes, usually pulling a passage from the page content instead, when it judges the written description doesn’t match the searcher’s specific query well. Writing one that’s clear, specific, and genuinely query-relevant reduces how often this happens, but never eliminates it.
How meta descriptions work
- Written into the page’s
<head>via ameta name="description"tag, invisible on the page itself. - Displayed under the title tag in search results, up to roughly 920 pixels wide on desktop before an ellipsis cuts it off.
- Google may show your written description as-is, or substitute a different passage from the page if it better matches the specific query.
- It carries no direct ranking weight, its entire value is earning the click once a searcher already sees the listing.
Meta description best practices
- Aim for roughly 120-155 characters as a practical proxy for the real pixel-width limit, front-loading the key message so it survives mobile truncation too.
- State a specific, concrete benefit. “Learn how to fix a running toilet in 10 minutes with basic tools” beats a vague restatement of the title.
- Match the query the page is actually meant to rank for. A generic, one-size-fits-all description is exactly what triggers Google’s rewrite behavior.
- Include the target keyword naturally. Google bolds matching terms in the displayed snippet, adding a small but real visual scan advantage.
- Write a unique description per page. Duplicate descriptions across a site waste the same differentiation opportunity duplicate titles do.
Meta description length by device
| Device | Approx. pixel limit | Rough character equivalent |
|---|---|---|
| Desktop | ~920px | ~150-160 characters |
| Mobile | ~680px | ~110-120 characters |
Real example
For example, “Learn how to fix a running toilet in 10 minutes with basic tools you already own” is a meta description that promises a specific, useful outcome rather than just restating the title, exactly the kind of clarity that also lowers the odds Google decides to rewrite it.
Meta descriptions and AI search
AI Overviews generate their own summaries from page content rather than displaying your written meta description, so its influence there is indirect at best. Its job remains focused on traditional SERP click-through, while the underlying page content itself, not the meta tag, is what an AI system draws from when summarizing or citing your page.
FAQ
Does the meta description affect rankings?
Not directly. It’s not a ranking factor, but it strongly influences CTR, which affects the actual traffic a given ranking position delivers.
Why does Google show a different snippet than what I wrote?
Google rewrites descriptions it judges don’t closely match the specific search query, often pulling a more relevant passage directly from the page content instead.
What happens if I leave the meta description blank?
Google will auto-generate a snippet from the page content for every query, giving you no control over what displays and often producing a less compelling result than a deliberately written one.
Should every page have a unique meta description?
Yes. Duplicate descriptions across multiple pages waste the differentiation opportunity and can make near-identical pages harder for both users and search engines to tell apart.
Related terms
Writing a great meta description doesn’t guarantee Google uses it, write one anyway. It’s still your best shot at controlling the pitch instead of leaving it to an algorithm.