---
title: "How often Google rewrites a meta description: three studies compared"
url: https://surfil.com/blog/meta-description-rewrite-rate-compared
section: reports
language: en
published: 2026-06-19T00:00:00.000Z
modified: 2026-06-19T00:00:00.000Z
author: Adam Hafez
topics: ["Technical SEO"]
---

# How often Google rewrites a meta description: three studies compared

## The short answer

Two studies measured this in 2020. Portent found Google rewrites meta descriptions 71% of the time on mobile and 68% on desktop, across 30,000 keywords. Ahrefs, whose study Portent set out to corroborate, found 62.78% on desktop snippets, across 20,000 keywords and 192,656 pages. Search Engine Journal's "over 70%" headline is coverage of Portent's figure.

## Key takeaways

- Portent's September 2020 study of 30,000 keywords found Google rewrites meta descriptions 71% of the time on mobile and 68% on desktop, via STAT Search Analytics.
- Ahrefs' 2020 study of 20,000 desktop keywords and 192,656 unique pages found a 62.78% rewrite rate, splitting to 59.65% for fat-head keywords and 65.62% for long-tail keywords.
- Search Engine Journal's "over 70% of the time" headline is coverage of Portent's own mobile figure, not a third independent dataset.
- Ahrefs' 62.78% rewrite rate means Google shows a page's own meta description in the snippet only 37.22% of the time overall.
- All three figures date from 2020, and Portent suggests its higher rate may come from its keyword mix, so the 62.78% to 71% spread is not a trend over time.

Ask how often Google uses a page's own meta description and you can get 71%, 68% or 62.78%
rewritten, depending on which 2020 study you open. Portent ran its study to corroborate Ahrefs'
earlier one, using different tools and a different keyword sample, and neither number is wrong. Search Engine Journal's widely cited "over 70% of the time" headline is coverage
of Portent's own mobile figure, not a separate measurement.

## The real numbers, study by study

Portent's Evan Hall reported a study that pulled first-page organic results for 30,000 client keywords (brand terms filtered out) through STAT Search
Analytics, split by mobile and desktop, and used a custom script to compare each SERP snippet
against the source page's meta description tag. Any snippet text not contained in the meta
description tag counted as a rewrite. The result: Google rewrote the description 71% of the time
on mobile and 68% of the time on desktop, meaning a site's own wording survived roughly three
times in ten. Portent also found rewrite rates ticked up for positions 4 through 6, which the
study speculated was Google trying to boost relevance for results below the top three.

Ahrefs' Michal Pecánek ran the other study, which Portent cites as recent and set out to
corroborate. It compared hardcoded descriptions with actual Google desktop snippets for 20,000
keywords, and its 192,656 unique pages are the ones whose descriptions it studied. Ahrefs found a
62.78% overall rewrite rate, splitting to 59.65% for fat-head (high-volume) keywords and 65.62% for
long-tail keywords, a small margin that Ahrefs called surprising. Ahrefs also noted that
descriptions are shown only about 37% of the time on average, the mirror image of the 62.78% rewrite
rate.

Search Engine Journal's Matt G. Southern covered Portent's study on 26 September 2020 and titled the
piece around the mobile figure, "Google Rewrites Meta Descriptions Over 70% of the Time." It is
the source most people quoting "70%" are actually citing, whether they know it traces back to
Portent's mobile number or not.

## Why Google rewrites a description

Neither study tested Google's reasoning directly; both only measured outcomes. For the reasoning,
Google's own Search Central documentation is the primary source. It says snippets are primarily
created from the page content itself, and that Google uses the meta description tag only "if we
think it gives users a more accurate description than would be possible purely from the on-page
content." It also warns that descriptions made of "long strings of keywords" are "less likely to
be displayed as a snippet," and recommends unique, descriptive wording for each page instead of
identical or similar descriptions.

That gives three factors from Google itself, none of them measured against a rewrite rate by
either study here: query relevance (Google picks whichever passage on the page best answers the
specific search), keyword stuffing, and generic or duplicated description text across pages. A
description that fails any of those tests is a plausible target for rewriting, but no published
study ties a specific one of these three factors to a specific percentage point, the way the title
tag studies isolated H1 match and character length.

## Why we care

**A meta description you wrote survives Google's rewriter a minority of the time**, on both
studies here, roughly three times in ten on Portent's numbers and closer to four times in ten on
Ahrefs'. That is still a reason to write one carefully: Google's own guidance ties snippet use
to accuracy, keyword stuffing and unique wording, all things a site controls, even though no study has
isolated those levers with a measured before-and-after the way the title tag research has.

**Meta descriptions and title tags are rewritten for different reasons at different rates**, and
citing one figure for both elements is a common mistake in SEO decks. This site's [title tag
rewrite rate study](/blog/title-tag-rewrite-rate-study) found Google rewrites titles 61.6% to
76% of the time, driven mostly by brand-name stripping and H1 mismatch, mechanics that do not
apply to a meta description, which has no equivalent on-page heading to match against. Treat the
two studies as answering related but separate questions, not the same question asked twice.

## Common questions

### Which meta description rewrite rate should I cite, 71% or 62.78%?

Name the study. Portent's 71% is its mobile figure (68% on desktop) from 30,000 keywords pulled through STAT Search Analytics in September 2020. Ahrefs' 62.78% comes from desktop snippets for 20,000 keywords and 192,656 pages. "Google rewrites descriptions X% of the time" is not a complete claim without the study attached.

### Is the Search Engine Journal "over 70%" figure a third study?

No. It is Search Engine Journal's write-up of Portent's own 71% mobile figure, published about two weeks after Portent's post. It confirms and amplifies one dataset rather than adding a second independent measurement.

### Why does Google rewrite a meta description at all?

Google's Search Central documentation says snippets are primarily built from page content, and that it uses the meta description only when it gives users a more accurate description. It warns that keyword-stuffed descriptions are less likely to be shown. Neither study tested these reasons; both measured the outcome.

### Does this apply the same way to title tags?

No, title tags and meta descriptions are rewritten for different reasons at different rates. See this site's separate coverage of [how often Google rewrites a title tag](/blog/title-tag-rewrite-rate-study), which found a 61.6% to 76% range driven mostly by brand-name removal and H1 mismatch, factors these two meta-description studies do not test for.

## Sources

1. [How Often Google Ignores Our Meta Descriptions](https://portent.com/blog/seo/how-often-google-ignores-our-meta-descriptions.htm) - Portent (primary)
2. [How Often Does Google Rewrite Meta Descriptions? (New Data Study)](https://ahrefs.com/blog/meta-description-study/) - Ahrefs (primary)
3. [Google Rewrites Meta Descriptions Over 70% of the Time](https://www.searchenginejournal.com/google-rewrites-meta-descriptions-over-70-of-the-time/382140/) - Search Engine Journal
4. [Control your snippets](https://developers.google.com/search/docs/appearance/snippet) - Google Search Central