Meta Description: What It Is, When Google Uses It, and How to Write One

Type “meta description” into Google. In second place is Google’s own page on the subject. We ran the search on September 14, 2026, on Google in Brazil, where we are based. ¹

Under the blue title, there are two lines of summary. They came from the middle of the page text. The description Google wrote into the code of that same page is a different sentence. ^{1 2}

Not even the page that teaches you to write the description came out with its own description. That is not a bug. It is the expected behavior, and it is written on that same page. ²

In the piece on on-page SEO, we already counted this on one search. Of the nine summaries for “seo on page,” eight were not the page’s meta description. ³

Here the question goes one step further. When does Google honor what you wrote, when does it turn it down, and what is left in your hands?

What a meta description is

Think of a restaurant. On the menu, the owner wrote one line under each dish. When a customer asks, the server chooses what to say. Sometimes the server reads the line from the menu. Sometimes they explain in their own words, drawing on what the customer asked.

In search, the server is Google. The explanation it gives under the blue title is the summary, and this is called the snippet. The line the owner wrote on the menu lives in the page’s code. This is called the meta description.

In the code, it takes up a single line: <meta name="description" content="...">, inside the page’s <head>. ² It sits next to the other tags that technical SEO checks. Whoever opens the page does not see that line. ²

Google’s page on the meta tags it supports describes that line in two sentences. It is a short description of the page, used in some situations in the snippet. ⁴ The help page on snippets compares the description to a pitch. It tries to convince people that the page is exactly what they are looking for. ²

When Google uses your description

The rule is in the opening of Google’s help page. The snippet comes mainly from the page content. The description comes in when it describes the page more accurately than the text itself. ²

The snippet also changes with the search. It is built to show the passage that best matches what the person typed. ² The same page can get one snippet on one search and another on the next.

Google’s starter guide says this another way. You have complete control over the words in the snippet, because they come from the page content. The description comes in occasionally, as a summary of one or two sentences. ⁵

The help page also closes the door on shortcuts. Google writes that it cannot manually change snippets for individual sites. ²

That is why I treat the description as a request. You suggest the text. Google decides, search by search.

What we measured across ten searches

The documentation says “sometimes.” We wanted to see how often, on a single day.

On September 14, 2026, we ran ten searches on Google in Brazil, with personalization off, in a browser tab of our own. ⁶ The searches were in Portuguese, the language of the market where we are based. We mixed intents: definition, recipe, government document, shopping, and local service. We wrote down the snippet of each organic result on the first page. Then we downloaded each page and compared the snippet with the meta description in its code.

There were 82 results. One came with no snippet, and ten pages could not be read. That left 71 to compare. ⁶

In 21 of the 71 results, the snippet was the meta description. In 49, it was a passage from the page text. ⁶

Of the 49 pages with a snippet taken from the text, 39 had a description in their code. Google read the request and chose another sentence. The other ten had no description at all. ⁶

Two pages used a generic description of the whole site, with nothing about the page itself. Both came out with text from the body. ⁶ Google’s help warns that identical descriptions on every page are not helpful. ²

The type of search made a difference. In the five informational searches, the description showed up in 6 of 38 snippets. In the four shopping and local service searches, it showed up in 12 of 25. There, it came out almost always on a homepage, a category page, or a product page. ⁶

Ten searches on one day do not make a law. They put a number and a date on the documentation’s “sometimes.”

The description does not move your position

In 2009, Google published a post about the keywords meta tag. In the middle of it, there is a sentence about the description. Google wrote that it sometimes uses the description in the snippet. And that, even so, it does not use it in ranking. ⁷

The post now carries a warning that some of its information may be outdated. ⁷ In the current pages I read, the description appears only as a possible source for the snippet. ^{2 4}

The effect the help page describes is on traffic. Good descriptions can appear in the results and improve the quality and quantity of your search traffic. ²

Bing writes it differently. Its webmaster guidelines say that missing, duplicate, or overly short titles and descriptions may reduce indexing and ranking. ⁸ The same item mentions eligibility as a source for grounded answers and citations. ⁸ If you depend on both search engines, that is one more reason not to leave the field empty.

What the right length is

Google does not set a length. The help page says there is no limit on how long a meta description can be. The snippet is truncated when needed, to fit the width of the screen. ²

The only measure Google offers is in sentences. The starter guide talks about a summary of one or two sentences. ⁵

Among the top results for “meta description,” we read eleven third-party texts that teach the subject. Every one of them gives a number, and the numbers run from 120 to 160 characters. One of them attributes the range to Google itself. ⁹

What Google asks for in a good description

The first rule is one description per page, different from the others. The homepage and the pages that group other pages get a description of the site. Everything else gets a description of the page itself. ²

If you lack the time to do them all, the help page says to prioritize. Start with the homepage and the most popular pages. ²

The description also accepts loose facts, outside sentence form. In an article, the author and the date. In a product, the price, the manufacturer, and the age range. ² The help page’s example shows the difference with a sewing supply store. The weak version is a list of materials. The better one says what the store sells, its hours, and its location. ²

A list of keywords stays out. The help page says that format is less likely to be shown as a snippet. ²

A large site built from a database can generate its descriptions by program. Google accepts and encourages this, as long as the sentences are readable and varied. For anyone writing each page by hand, the help page notes that one extra sentence takes minimal effort. ²

Where the page gives orders to the snippet

The description is a request. There is another way to talk to the snippet, and the documentation treats that one as a rule.

The nosnippet rule says not to show a text snippet for the page. The max-snippet rule sets the maximum number of characters in the snippet. At zero, it works the same as nosnippet. At minus one, Google chooses the length. ¹⁰

When two rules conflict, the more restrictive one applies. A page with max-snippet:50 and nosnippet gets no snippet at all. ¹⁰

Sometimes the problem is a single passage. Think of a document with one line covered by a black redaction bar. The reader sees the rest and skips the covered line. On a page, the bar is an attribute on span, div, and section elements. This is called data-nosnippet. ¹⁰

The documentation asks for one technical precaution with the bar. Do not add or remove the attribute through JavaScript after the page exists. ¹⁰

These rules also weigh on Google’s AI. The nosnippet rule applies to AI Overviews and AI Mode. It keeps the content from being used as a direct input for those features. ¹⁰ And the condition for appearing as a supporting link in them is that the page can appear in Search with a snippet. ¹¹

Before you redact the whole page, weigh the cost. A page with no snippet can no longer be a link in Google’s AI answers. ¹¹

Bing already accepted nosnippet and started accepting max-snippet in 2020. In the announcement, it wrote that it would use these options as directives. ¹² The current guidelines warn that nosnippet and data-nosnippet keep Bing from showing the snippet. They add that both may limit citation quality in Copilot. ⁸

Our own case

The old seogenome.com, on WordPress, had a meta description on 1 of its 22 published pages. ¹³ The other 21, the homepages included, went out with no request at all. The full case, with what a plugin would have filled in, is in the piece on SEO for WordPress.

On the new site, each piece is born with a field of its own for the description. Whoever writes the piece fills that field with a sentence of 130 to 158 characters. ¹⁴

That range is a house rule. Google does not write any number. ² We keep the yardstick because the snippet is cut to fit the screen, and a cut sentence loses its ending. ² If the field stays empty, the site uses the first sentences of the opening, up to about 160 characters. ¹⁴

So we measured our own site. In a search for seogenome.com pages, ten results showed up on the first page. Five came with our description. For the other five, Google picked a sentence from the text. ¹⁵

The ten descriptions were similar in length, inside the range or close to it. Length did not separate one group from the other. ¹⁵ Of the five that came out with our description, four were a homepage or an article list. ¹⁵

A search restricted to the site’s address is a special case, with no topic in the query. It works as a snapshot, and the snapshot has a date.

The lesson we take from it is practical. The page text works as a second description, because the snippet comes mainly from it. ² Each section needs a first sentence that stands on its own. And each heading needs to announce the passage below it, as the piece on titles as addresses shows.

The fifteen-minute check

1. Run a crawl. The Meta Description tab in Screaming Frog shows the pages with no description and the duplicated ones.
2. Start with the homepage and the most popular pages. That is the order Google’s help page suggests. ²
3. Write one or two sentences about that specific page. Swap adjectives for facts: author, date, price, neighborhood, hours. ^{2 5}
4. Delete the keyword list. That format is less likely to show up. ²
5. Look the page up on Google and compare. If the snippet came from the text, read the sentence Google picked. It shows which passage Google tied to that search. ²
6. Decide what to redact. Use data-nosnippet only on a passage that cannot appear out of context, and remember the cost in AI answers. ^{10 11}

From now on, when the snippet comes back different from what you wrote, you will read it as an answer. Google read the request and picked another sentence for that search. The work goes on in two places: the description field and the page text.

Open your crawler today, sort the description column, and write the one for your homepage.