Meta descriptions in 2026 — what still matters when Google rewrites 70% of them

Write one anyway. Ahrefs studied 192,656 pages in 2020 and found Google rewrote the meta description 62.78% of the time. Portent's follow-up reported 68% on desktop and 71% on mobile. Industry estimates for 2024 push it past 80% on long-tail queries. The description still matters. Just not for the reasons it used to.

What Google's documentation actually says

Google's "Control your snippets in search results" page (developers.google.com/search/docs/appearance/snippet) is unambiguous on length: "There's no limit on how long a meta description can be, but the snippet is truncated in Google Search results as needed, typically to fit the device width." The character-count rules everyone repeats are folk wisdom layered on top of a pixel-width truncation system. Google's own guidance is qualitative: unique per page, accurate summary, no keyword stuffing.

The 70% rewrite stat sits next to a second Google admission: the search engine "sometimes uses the meta description HTML element if it might give users a more accurate description of the page than content taken directly from the page." Translation: your meta description is a fallback string Google chooses to honor or override, depending on the query.

The pixel-width truncation math

Google measures snippets in pixels, not characters. The default SERP font is Arial 14px. A capital W eats roughly three times the horizontal space of a lowercase i, which is why two 155-character descriptions truncate at very different visible lengths.

Practical 2026 limits:

• Desktop: ~920 pixels, which lands at 155–160 characters for average-width text.

• Mobile: ~680 pixels, or 110–125 characters.

• Google Discover cards: 80–100 characters before truncation.

A bolded query term inside the snippet inflates pixel count and pulls the cutoff earlier. So does a date prefix on news and blog results, which steals 60–80 pixels, or about 10–12 characters of visible space.

The audit-friendly window is 50–160 characters. Under 50 and Google treats the description as too thin and pulls body copy instead. Descriptions under 70 characters rarely survive into the SERP at all. Past 160 the truncation point lands mid-sentence on mobile, killing the CTR hook.

The rule: target 120–155 characters with the differentiator front-loaded into the first 110. Verify with a pixel-based SERP preview rather than a character counter.

The HTML, exactly

<meta name="description" content="Audit your site's AI readiness, technical SEO, security headers, and Core Web Vitals in one Cloudflare-native scan. Free report in under 30 seconds.">
<meta property="og:description" content="One scan. AI readiness, SEO, security, and performance scored together. Built on Cloudflare. Try it free.">

Two tags, two surfaces. name="description" feeds Google. property="og:description" feeds Facebook, LinkedIn, Slack unfurls, and iMessage previews. They should not be identical. Search readers carry intent from a query; social scrollers do not. Open Graph copy runs longer (Facebook displays up to ~300 characters) and leans conversational. Skip og:description and platforms fall back to your meta description, which was written for keyword intent, not feed scrolling.

Two before/after rewrites

A SaaS feature page meta description, drafted the lazy way:

Before: "Welcome to our innovative platform that empowers businesses to leverage cutting-edge AI solutions for transformative growth in the digital era." (137 chars, zero facts)

That description gets rewritten by Google on every query. It tells an AI summarizer nothing extractable. Now the rewrite:

After: "Stripe-native subscription analytics for B2B SaaS. Track MRR, churn, and LTV across plans in real time. Free 14-day trial, no credit card." (149 chars)

Five concrete facts packed into 149 characters: the integration (Stripe), the audience (B2B SaaS), the metrics (MRR, churn, LTV), the freshness (real time), the offer (free trial, no card). Google has something to bold. An AI Overview has something to quote. A human has a reason to click.

A blog article example, same pattern:

Before: "In this comprehensive guide, we'll explore everything you need to know about meta descriptions, including length, best practices, and tips to improve your SEO performance." (171 chars, truncates mid-thought)

After: "Google rewrites 70% of meta descriptions but still uses yours for AI Overviews. Target 120–155 characters, lead with the differentiator, write factual openers." (157 chars)

The second version states the surprising stat up front and gives a concrete number readers want. If Google keeps the description, the click rate goes up. If Google rewrites it, an AI assistant indexing the page still has a clean factual sentence to extract as the canonical summary.

Why AI changes the calculation

Meta descriptions used to be SEO-only and CTR-focused. They are now dual-purpose. ChatGPT, Perplexity, Claude, and Google AI Overviews fetch pages, parse the <head>, then often use the meta description as the structured short summary attached to a citation. Where Google rewrites your description in 70% of SERPs, an AI assistant reading the raw HTML almost always uses what you wrote. There is no query-context signal for the LLM to override it with.

This flips the writing brief. A clever rhetorical opener wins clicks but reads poorly when an LLM extracts it as a one-line description of your company. A flat factual opener reads boringly in a SERP but works perfectly as the citation snippet under your brand name in an AI answer. Write the opener factual, then add the hook in the second clause.

Bad for AI extraction: "Stop wasting hours on manual reports." Good for AI extraction: "Flowdash automates customer-success reports for B2B SaaS teams." Both ship in the same description if you order them correctly.

Length should also bend by page type. Long-form content (guides, articles, documentation) earns the full 155-character envelope because topic depth justifies the richer summary. Product and category pages should run shorter, in the 80–120 character range, because the description is competing with rich result modifiers like price, rating, and stock status that consume snippet real estate. A 155-character product description gets clipped to make room for structured data Google considers more useful. Homepages sit in the middle: 120–140 characters, factual opener naming the company and category, hook in the second half.

Verify before shipping

Run isitready.dev on your canonical origin to flag missing meta descriptions, duplicate descriptions across pages, lengths outside the 50–160 window, and og:description gaps that force social platforms to fall back to search copy. The report breaks results down per URL, so you see exactly which pages need a rewrite before Google rewrites them for you.