How to write a meta description: what Google uses, what it ignores, and a six-step routine

By Thomas Lovas Lokoy · Published 16 October 2026 · 7 min read

Rows of newspapers on a rack — Photo: Free newspaper stand image · CC0

A meta description is a short summary of one page, written for the person deciding whether to click. Google does not always show it, and nothing it publishes sets a character count you have to hit. What it does publish is a clear account of when the meta description gets used, what makes one useful and what makes one worthless. This guide turns that into a method you can apply to every page, plus the mistakes worth checking for before you publish.

What a meta description actually does

The meta description sits in the page's HTML and is invisible to anyone reading the page. Its only job is to describe the page to someone who has not opened it yet, which in practice means a person looking at a list of search results.

Google is direct about how much weight it carries. Its snippet documentation says that snippets "are primarily created from the page content itself", and that Google may use the meta description "when it describes the page better than other parts of the content". The SEO starter guide puts it the same way: the snippet may occasionally be sourced from the meta description. So the description is a candidate, not a command. Google reads your page, reads your description, and picks whichever it thinks gives the searcher the more accurate picture. The same page notes that Google Search "might show different snippets for different searches", because the most useful passage for one query is not the most useful for another.

Two things follow. First, a description that is vague or generic will lose to the page text, so writing one badly is close to not writing one at all. Second, a description that is specific and accurate gives Google a good option, which is the most you can do.

One thing it does not do is carry keywords into the ranking system. The separate keywords meta tag is a different matter, and the starter guide is unambiguous that "Google Search doesn't use the keywords meta tag". Neither tag is a place to list search terms.

Is there a meta description length limit?

No fixed one. The snippet documentation says: "There's no limit on how long a meta description can be". The same page explains that the snippet is truncated in search results as needed, typically to fit the device width. That is why character counts quoted elsewhere vary and why none of them comes from Google: the cut-off depends on the screen, not on a rule.

What Google does say about length is qualitative. The starter guide describes a good meta description as one that "is short, unique to one particular page, and includes the most relevant points of the page". The practical consequence is about order rather than length: put the information a searcher needs first, so that whatever survives truncation still makes sense. A description that only reaches its point in the final clause is fragile on a narrow screen.

If you need to control snippet length for a technical reason, Google documents a separate meta tag for that, max-snippet. It is a limit on what Google may show, not advice on how long to write.

How to write a meta description, step by step

This is the routine, in order. It takes a few minutes per page once you have done it a dozen times.

Write down the page's single purpose in one sentence. Not the topic, the purpose. "Explains how to fix a dripping mixer tap without replacing the cartridge" is a purpose; "Plumbing advice" is a topic. If you cannot write this sentence, the problem is the page, not the description.
Name the reader's outcome. What will they know, have or be able to do after reading? Google's own better example for a cookery page is "Learn how to cook eggs with this complete guide in 1 hour or less." It states what you will get and a concrete detail about it.
Add the facts a searcher would use to choose. Google's documentation suggests that news or blog posts can list the author, date of publication or byline information, and its example for a shop includes opening hours and location. For a guide it might be the number of steps, the country the advice applies to, or the tool it covers. Specifics are what make a description distinguishable from the nine other results.
Use the words the searcher used, once. If people search for "meta description", the phrase belongs in the description because it tells them the page is about their question. Once is enough. The snippet documentation warns that descriptions made of long strings of keywords do not give users a clear idea of the page's content.
Lead with the substance. Move the most important clause to the front, so truncation removes detail rather than meaning.
Check it against the page. Every claim in the description must be true of the page as published. If the description says "with examples", the page must have examples.

Good and bad examples from Google's own guidance

Google's snippet documentation pairs weak descriptions with better ones. They are worth studying because each weak example fails in a different way.

A list of keywords. "Sewing supplies, yarn, colored pencils, sewing machines, threads, bobbins, needles" tells the searcher nothing about the shop. The better version says what you can do there and adds hours and location.
The same description on every page. A news site that uses "Local news in Whoville, delivered to your doorstep. Find out what happened today." on every article makes each result look identical. The better version summarises the specific story.
A line that does not summarise. "Eggs are a source of joy in everyone's life." is pleasant and useless. The better version says what the guide teaches.
Too short to help. "Mechanical pencil" names a product category; the better version names the specific product and what distinguishes it.

The pattern across all four is the same: the better versions are specific to one page and say something a searcher can act on.

Unique descriptions, and what to do on large sites

Google's guidance says plainly that "identical or similar descriptions on every page of a site aren't helpful when individual pages appear in search results". If several of your pages rank for the same query, identical descriptions make them indistinguishable.

The guidance allows for limited time. It suggests site-level descriptions on the home page and other aggregation pages, and at the very least a description for critical URLs such as the home page and popular pages. For a blog, that means writing every description by hand for the articles that bring in traffic, and accepting that older or minor pages may be left to Google's own snippet.

For large database-driven sites, Google says that hand-written descriptions can be impossible, and that programmatic generation of the descriptions "can be appropriate and are encouraged". The condition is quality: "Good descriptions are human-readable and diverse." A template that fills in a product name and three attributes is acceptable if the result reads as a sentence and differs meaningfully from page to page. A template that produces the same sentence with one word swapped is the repeated-description problem at scale.

The same applies to descriptions written by an AI tool. They are content, and they need the same check as the body: does each claim match the page? The fact-checking routine includes the metadata step for exactly this reason, and how Google treats AI-generated content covers the wider policy.

Common mistakes to check before publishing

Run each new description against this list:

It promises something the page does not deliver. This is the most damaging mistake, because it costs you the reader's trust at the first click.
It is a copy of the opening paragraph. If the description adds nothing beyond the page text, Google has little reason to prefer it.
It is the site tagline. Fine on the home page, wrong on an article.
It repeats the title. The title and description appear together in results; use the description for what the title had no room for.
It is stuffed. Variants of one phrase strung together read as spam to people, whatever they do for anything else.
It contains details that go stale. Prices, dates and "this year" go out of date. Update them or leave them out.

When you do not want a snippet

Occasionally the right answer is to show less. Google documents a nosnippet meta tag that stops it from showing a snippet for a page, and a data-nosnippet attribute that keeps specific parts of a page out of snippets. These are for content you have a reason to withhold, not tools for improving clicks.

Where the description fits

The meta description is the second half of a pair. The title does most of the work of telling a searcher what the page is; the description supports it with specifics. If you are working through both, the companion guide on how to write title tags for SEO follows the same method for the other half.