• Meta descriptions do not affect rankings directly. They affect clicks.
• Google rewrites the majority of them to better match the query.
• Put the key message in roughly the first 150 characters. Running long is not a problem worth chasing.
• Prioritise hand-written descriptions for your highest-traffic pages.
• A missing description is better than the same one repeated on every page.

A meta description is your suggested summary for a page. Search engines can show it in results, and social platforms and messaging apps sometimes use it as a fallback when Open Graph tags are missing.

 <meta name="description" content="Learn what canonical tags do, how to implement them correctly and the mistakes that cause Google to ignore them." /> 

Does it affect rankings?

No. Google has not used the meta description as a ranking signal for many years. Its value is in persuading the right searcher to click. Since click-through rate determines how much traffic a ranking is worth, that still matters.

Google rewrites most of them

Studies consistently find that Google replaces the supplied description well over half the time, pulling text from the page that better matches the specific query. This is normal and often helpful. You are most likely to see your own description used for the page's primary query, which is exactly where you want a polished message.

How to write a good one

• Summarise what the page offers and why it is worth the click.
• Lead with the important part. Truncation happens at the end.
• Use the language of the query. Matching words are shown in bold.
• Be specific. Prices, numbers, delivery times and other facts make a snippet more useful.
• Make each one unique.
• Avoid double quotation marks in the content, as they can cut the attribute short. Use single quotes or the HTML entity.

Length

There is no limit on what you can write. Google usually displays up to about 155 to 160 characters on desktop and somewhat less on mobile, and the amount varies by query. A description that runs over simply gets trimmed, and Google copes with that perfectly well. It is rarely worth an audit ticket. Just make sure the most persuasive part comes first.

Scaling across large sites

For thousands of pages, programmatic descriptions built from product or listing data are a sensible approach, as long as they read naturally and vary from page to page. For long-tail pages you can also leave the description out and let Google generate the snippet. Save manual effort for the homepage, key categories and top landing pages.

Controlling snippets

If you want to limit what Google shows, use robots directives: nosnippet, max-snippet and the data-nosnippet attribute. These apply to AI-generated features too.

Common mistakes

• The same description on every page.
• Keyword lists in place of sentences.
• Descriptions that do not reflect the page content.
• Treating length warnings from audit tools as urgent.
• Forgetting that multiple meta description tags on one page can confuse things.

How to test

• Crawl the site for missing and duplicate descriptions.
• Check Search Console for pages with strong positions and weak click-through rate.
• Search your main queries and see which snippet Google is actually displaying.

The GEO angle

AI answers are built from page content, not meta descriptions. Even so, a tight one or two sentence summary is a useful discipline. If you can state what the page delivers in 150 characters, put that same clarity in the opening paragraph, where both Google's snippet system and AI retrieval will find it.

Add your title here

This is a paragraph. Writing in paragraphs lets visitors find what they are looking for quickly and easily. Make sure the title suits the content of this text.