A meta description is a short summary of a web page written in the page's HTML. Search engines may show it as the snippet of text under your headline in search results. It doesn't appear on the page itself, but it is often the second thing a searcher reads about you, right after the title.
What is a meta description?
A meta description is an HTML tag in a page's head section, written as <meta name="description" content="...">. The text inside it summarizes what the page covers.
Google calls the gray text under a search result a "snippet." According to Google's snippet documentation, snippets are generated automatically from page content, and Google sometimes uses the meta description when it describes the page more accurately than other text on the page. That means the meta description is a strong suggestion, not a guarantee. Google may show different snippets for the same page depending on what someone searched.
Why meta descriptions matter
Meta descriptions don't directly change where you rank. Google's SEO Starter Guide discusses them only as a possible source of snippet text, not as a ranking signal. What they can influence is whether people click.
When a searcher scans the SERP, a clear, specific description helps them pick your result over a vague one. Details like price, location, or availability help the right buyers self-select. A good description supports your click-through rate without promising anything the page can't deliver.
How often Google uses your meta description
Google rewrites snippets often. An Ahrefs study from 2020 of 20,000 keywords found Google showed something other than the written meta description about 63% of the time. The same study found about a quarter of top-ranking pages had no meta description at all. The data is a few years old, so treat it as a sign of the pattern rather than a current number.
The takeaway is not that descriptions are useless. Google tends to rewrite when a description doesn't match the query, so a well-written summary of the whole page has a better chance of being shown for the searches that matter most.
How to write a good meta description
- Write a unique description for each page. Google recommends this directly. If you can't cover every page, start with your homepage and most important pages.
- Summarize the whole page. Describe what the reader will actually get. Google advises against strings of keywords and in favor of real summaries.
- Include useful specifics. Google suggests details like author, publication date, price, or key specs. For a local business, that might be the service area and hours.
- Front-load the important part. Google sets no maximum length, but snippets are truncated to fit the device. Keep descriptions to a couple of sentences and put the key detail first, so it survives if the end gets cut off.
- Match the intent of the query. A how-to guide should hint at the steps inside, and a product page should give the reason to buy.
- Generate carefully at scale. For large database-driven sites, Google says programmatic descriptions are fine as long as they stay readable and varied.
A hypothetical example: a plumbing company's page with the description "Plumbing services. Call us." gives searchers no reason to choose it. "Same-day drain cleaning and water heater repair in Denver. Licensed plumbers, upfront pricing, and weekend appointments available." says who, what, where, and why in one breath.
Common meta description mistakes
- Duplicate descriptions. Copying the same text across dozens of pages makes them look interchangeable and gives Google a reason to ignore your text.
- Keyword lists. "SEO, SEO agency, SEO services, best SEO" reads like spam and is unlikely to be shown.
- Using it to hide content. If you don't want certain text shown, use Google's snippet controls instead. The nosnippet rule blocks snippets, max-snippet caps their length, and the data-nosnippet attribute excludes specific sections. Per Google's robots meta tag documentation, nosnippet and max-snippet also limit how content is used in AI Overviews and AI Mode.
Meta descriptions and AI search
As of October 2026, Google says there are no special optimizations needed to appear in AI Overviews or AI Mode. Those features build answers from page content, not from your meta description alone. Still, a clear description is a useful discipline: if you can't summarize a page in two sentences, the page itself may need a sharper focus, and focused pages are easier for both search engines and AI systems to understand.
How Butter approaches meta descriptions
At Butter, we treat meta descriptions as part of on-page work, reviewed together with the title tag and headings. We look for missing and duplicate descriptions, check which pages Google is rewriting, and rewrite descriptions that don't reflect what the page offers. We don't promise a particular click-through lift, because Google decides what to show.
On the GEO plan, this shows up in our monthly on-page recommendations. On the GEO+SEO plan, we handle the rewrites ourselves as part of unlimited on-page optimization.
Frequently asked questions
Is the meta description a ranking factor?
Google's documentation discusses meta descriptions only as a possible source of snippet text, not as a ranking signal. Their value is in helping searchers decide to click. A good description supports clicks, not position.
How long should a meta description be?
Google sets no maximum length and truncates snippets to fit the device. A sentence or two that summarizes the page is usually enough. Put the most useful information first so it survives truncation.
Why isn't Google showing my meta description?
Google builds snippets to match each query and may pull text from the page when it thinks that text fits better. This is common and not a penalty. A unique, accurate summary of the whole page gives your description the best chance of being used.