A meta description is an HTML tag in the <head> of a page that gives search engines a short summary of that page. Google can use it as the snippet, the grey text under your title in search results, and a clear one is your second chance to persuade a searcher after the title.
What is a meta description?
It is one line of HTML:
<meta name="description" content="Compare five standing desks by width, motor noise and price. Includes a size chart and a 30-day return policy check.">Google’s snippet documentation says snippets are generated automatically from the page content, tailored to each search. The same page can show different snippets for different queries. Google uses your meta description only when it gives a more accurate picture of the page than text it can pull from the page itself.
Does the meta description affect rankings?
No. Google does not use the meta description tag as a ranking signal. Its value sits in the click: a snippet that matches what the searcher wants earns more clicks, and clicks are what you are after. That makes this a Low impact method for rankings, and a cheap one for click-through rate on pages that already rank.
How long should a meta description be?
Google’s documentation states there is no limit on how long a meta description can be. Results are truncated as needed, typically to fit the device width. A working target is 110 to 160 characters with the main point in the first 100. Treat that as a habit, not a rule from Google.
How do you write a meta description, step by step?
- Summarize the whole page in one or two sentences. Google’s guide asks for a summary of the page, and warns against keyword lists and generic text reused across pages.
- Lead with the answer or the benefit. Say what the reader gets: a size chart, a price list, a template.
- Use the keyword once, naturally. Repeating it adds nothing.
- Add the useful detail. Google suggests author, publication date, price or specifications where they fit a page type. A product page gains from the price and stock status, an article from the date.
- End with a reason to click. “See the full comparison” works when the page has one. Keep it honest.
- Write a unique description per page. Home and category pages get site-level descriptions. If you cannot cover every page, start with the URLs that bring the most impressions.
- Generate on large sites, with care. Google says database-driven sites such as product catalogs can build descriptions programmatically, as long as they stay human-readable and varied. Pull in real fields (product name, price, one-line summary) instead of repeating one template.
- Check what shows. Search the exact query and see the snippet. If Google replaces your text, it found a part of the page that fits the query better, which is fine.
Can you use AI to write meta descriptions?
Yes, as a first draft. Feed the model the page text and the target query, ask for a two-sentence summary under 160 characters, then read it. Check three things before publishing: every claim appears on the page, the wording differs between pages, and the text reads like something you would click. A hundred identical AI patterns across a site produce the generic text Google tells you to avoid. See AI-assisted content for the wider rules.
How do you control or hide snippets?
Three tools exist, documented by Google:
| Control | What it does |
|---|---|
nosnippet |
Stops a text snippet from showing for the page |
max-snippet:[number] |
Caps the snippet at that many characters |
data-nosnippet |
Hides specific parts of the page from snippets |
Use them for paywalled or sensitive text. For most pages, leave them off, because a missing snippet loses clicks. Pages that want a featured snippet also need to stay snippet-eligible.
How do you measure the result?
In Google Search Console, open the Performance report, filter by page, and compare CTR (click-through rate) for the same position before and after the edit. Use equal date ranges and change one field at a time. Wait a few weeks, because Google has to recrawl the page. A rise in CTR at a steady position tells you the new snippet works.
What mistakes should you avoid?
- Duplicate descriptions across hundreds of pages. Google ignores them and builds its own.
- Keyword lists. “shoes, cheap shoes, buy shoes” reads like spam.
- Overpromising. A snippet that the page does not back up raises bounce and costs trust.
- Burying the main point. Put the answer first, because the end gets truncated.
- Obsessing over it. Fix title tags first, since they carry more weight with both Google and readers.
Where can you learn more?
The free digital marketing module of the Fe/male Switch startup school covers on-page SEO for a new startup site. Next steps on SEO100: pair each description with a matching title tag and keep it consistent with the heading structure.