How to Write Meta Descriptions: A Practical Guide

A good meta description is a two-sentence pitch, written for the specific searcher, that gives Google a reason to show your version instead of writing its own. Most businesses either leave the field blank and let Google generate something generic from the page, or stuff it with keywords nobody would ever read as a sentence. Neither approach earns the click. Learning how to write meta descriptions that get chosen and clicked, rather than rewritten or ignored, depends on four things: length, specificity, a genuine reason to click, and matching what the page truly delivers.

Google's own Search Central documentation describes a meta description as a pitch: 'a short, relevant summary of what a particular page is about... like a pitch that convinces the user that the page is exactly what they're looking for.' Google states there is no fixed limit on how long a meta description can be, but the snippet shown in results is truncated as needed, typically to fit the device width. That single line settles two arguments at once: there is no secret maximum character count Google enforces, and writing past the point where it gets cut off wastes your best sentence on a reader who will never see it.

Ahrefs' 2026 meta description study recommends working to roughly 920 pixels, about 160 characters, on desktop and 680 pixels, about 120 characters, on mobile, since anything beyond that gets truncated before a reader reaches the end of the sentence. Write the line containing your strongest reason to click first, and treat everything past 120 characters as a bonus a mobile reader may never see, not the place you save your best line.

Character counts are a proxy, not the real limit. Google truncates by pixel width, not letter count, so a description built from wide characters, capital letters, M, W, hits the cutoff sooner than one built from narrow characters, i, l, t, even at the same character count. Two descriptions can both sit at 155 characters and one displays in full while the other cuts off mid-word. Write the sentence, then check it in a search results preview tool rather than trusting a character counter alone.

The same Ahrefs 2026 study found Google uses the page's own written meta description in search results only 37% of the time, rewriting it the rest of the time when it judges your version is not a good match for the specific query someone typed. Google's own documentation confirms this directly: it generates a description automatically 'if we think it gives users a more accurate description than would be possible purely from the on-page content.' The practical implication is that a meta description is not really written for every query your page could rank for, it is written for the specific query you most want to win, and Google decides case by case whether your pitch beats its own summary.

The two most common mistakes sit at opposite ends of the same problem: leaving the field blank, which hands Google full control of your pitch for every query, and writing one generic description then pasting it across dozens of pages, which Google's guidance on title links warns against for the equivalent problem with page titles, boilerplate text that stops a reader distinguishing one page from another in a results list. A third, quieter mistake: describing the page instead of the searcher's problem. 'Learn about our SEO services' describes the page. 'Rank on page one without guessing at what Google wants' describes what the reader gets.

You're thinking a sharper meta description across the whole site should move the needle on its own. On a page with no meaningful search volume behind its target keyword, a better meta description improves nothing, because there is no traffic there to click through in the first place. On a page competing against results with far stronger authority and content depth, a better snippet might lift click-through rate slightly without changing the page's ranking position at all, since Google does not treat the meta description as a ranking factor, only as an influence on the snippet's presentation. And on a site with real crawlability or indexing problems, the meta description tag never gets the chance to matter, since a page Google has not indexed cannot show a snippet to anyone. If your site's technical foundation is the real gap, our guide to SEO friendliness covers the crawlability and structure checks to run first.

Start from the searcher's real question, not your service list. Someone searching 'how to write meta descriptions' wants to know what to type, not a list of your agency's credentials, so the description that earns that click states a concrete outcome or number in the first half of the sentence, before the truncation point. A worked example: 'Meta descriptions get rewritten by Google 63% of the time. Here's how to write the 37% that survive.' names a real figure, poses an implicit question, and gives a reason to click that a generic 'Learn about our approach to SEO' never will.

A before-and-after makes the difference concrete. Before: 'We are a leading SEO agency helping businesses grow online through search engine optimisation and digital marketing solutions.' It describes the company, uses no number, and could sit unchanged on a thousand competitors' homepages. After: 'Ranking on page one takes longer than most agencies admit. See the 12-month SEO programme that gets London businesses there, and what it costs.' It states a specific timeframe, names the location, and promises a concrete piece of information, the cost, that the generic version withholds. This is an illustrative example, not a specific client's actual copy, but the underlying principle, specificity beats description, holds for any page you write one for.

Then test it. Google Search Console's Performance report shows the real click-through rate for a page after a description change, compared to the same page's rate beforehand, which is the only real evidence that a rewritten description helped, not a guess about what sounds punchier. If you're building this into a wider on-page SEO effort rather than fixing one field at a time, our guide to SEO for small business covers the fuller on-page programme this sits inside, and our SEO agency team can run the full technical and on-page audit rather than leaving you to guess page by page.

Do meta descriptions directly affect Google rankings?

No, not directly. Google does not use the meta description tag as a ranking signal, only as a potential source for the snippet shown in results. Its indirect effect on rankings comes through click-through rate: a description that earns more clicks at the same position can lift a page's visibility over time, but the tag itself carries no ranking weight.

What happens if I leave the meta description blank?

Google generates one automatically from the page content, choosing whichever sentence or fragment it judges most relevant to the specific query. That automatic version is unpredictable and out of your control, so a page with no written description effectively has a different, Google-written pitch for every different search query it ranks for.

Should every page on a site have a unique meta description?

Yes. Duplicate or templated meta descriptions across multiple pages waste the opportunity to differentiate each page in the results and can make it harder for a searcher to tell which of several similar-looking pages answers their specific query.

Can AI Overviews or AI-generated summaries make meta descriptions less important?

They shift where the description matters rather than remove it. Google has begun testing AI-generated descriptions in some results, and AI answer engines such as ChatGPT and Perplexity often pull the same on-page summary sentence to construct their own citations, so a clear, well-written first sentence still does double duty: winning the click in traditional search and giving AI systems an accurate line to quote.

If you want your meta descriptions written to win the click rather than filled in as a formality, contact the Blackstone Media team and we'll show you where duplicate or missing descriptions are already costing you traffic before you spend a penny on anything else.