Meta description

A meta description is an HTML element that provides a short summary of a web page's content. It is written as a <meta> tag with the attribute name="description" and is placed in the page's <head> section. Search engines may display its text as the snippet beneath a page's title in search results, though they are not required to.

The meta description is not shown on the page itself. Major search engines, including Google, have stated that it is not a direct ranking factor, but a well-matched snippet can influence whether a reader chooses to open a result. The element is one of several metadata fields, alongside the title element, used to describe a page to machines and people.

Note: The meta description is distinct from the meta keywords tag, an older element listing search terms. Google has stated since 2009 that it does not use the keywords tag in web ranking.

Meta description
Type	HTML metadata element
Syntax	<meta name="description" content="...">
Location	<head> section of an HTML document
Defined in	HTML specification (WHATWG HTML Living Standard)
Visible on page	No
Direct ranking factor	No, according to Google
Typical display length	Roughly 150–160 characters (varies)
Related elements	Title element, Open Graph tags, Twitter Card tags

Overview

Web pages contain content visible to visitors and metadata visible mainly to software. The <meta> element carries the latter, with different name values serving different purposes: viewport for mobile rendering, robots for crawler instructions, and description for a summary.

The HTML specification describes the description value as a short, human-readable summary of the page. It does not set a length limit, mandate a format, or oblige software to display it. Search engines therefore treat it as a suggestion rather than a command.

History

The <meta> element has existed since the early years of HTML and was included in the HTML 2.0 specification published as RFC 1866 in 1995. Early web search engines relied heavily on page-supplied metadata because they had limited ability to analyze full text. The description and keywords values became common conventions rather than formal standards.

Widespread abuse of the keywords tag through repetition of irrelevant terms led search engines to discount it. Google's public statement in September 2009 that it ignored the keywords tag is often cited as a turning point. The description tag was retained for snippet generation, and Google has said that it does not use the description for ranking.

Social platforms later introduced parallel fields. The Open Graph protocol, introduced by Facebook in 2010, added og:description. Twitter's card markup added twitter:description. These are separate from the standard description tag.

How it works

Syntax and placement

A typical declaration looks like this:

<meta name="description" content="A short summary of the page.">

The element belongs in the <head>. Each page should carry one description tag. Quotation marks inside the content value should be escaped or avoided, since they can break the attribute.

Snippet generation

When a search engine indexes a page, it can build a snippet from the meta description, from text on the page, or from a combination. Google's documentation states that it uses the meta description when it is judged to describe the page better than text extracted from the content. Its systems may also generate different snippets for different queries on the same page.

Third-party analyses have reported that search engines often replace the supplied description, with published estimates varying by study and dataset. Because these figures depend on methodology, no single number is settled.

Length

Neither the HTML specification nor Google's documentation sets a fixed character limit. Truncation depends on the pixel width of the displayed text and on the device. Commonly cited working ranges are:

Context	Commonly cited range	Notes
Desktop results	About 150–160 characters	Width-based truncation, often with an ellipsis
Mobile results	About 120 characters	Varies by device and layout
Social sharing previews	Varies by platform	Determined by each platform's card format

These ranges are conventions from practitioners, not official requirements, and search interfaces change over time.

Uses and Practices

Guidance from search engines and web standards documentation generally recommends the following:

1. Unique descriptions per page. Google advises against reusing one description across many pages, since duplicates give little information to distinguish results.
2. Accurate summaries. The text should reflect actual page content. Misleading descriptions may be ignored and can reduce reader trust.
3. Plain language. Full sentences are preferred over lists of keywords.
4. Relevant facts. For some pages, such as products or articles, specific details (a date, author, or price) can help a reader judge relevance.

Search terms that match a reader's query may appear in bold in the snippet, one reason writers often include the page's main subject in the description.

Controlling snippets

Site owners can limit what appears in results. Google supports the nosnippet robots directive, the max-snippet directive to cap length, and the data-nosnippet attribute to exclude specific page sections. These controls apply to snippets in general, whether drawn from the meta description or from page text.

Comparison with related elements

Element	Purpose	Displayed where
Title element	Names the page	Browser tab; search result headline
Meta description	Summarizes the page	Search result snippet (not guaranteed)
Meta keywords	Listed search terms	Not used by Google for ranking
og:description	Summary for social sharing	Link previews on supporting platforms
Structured data	Machine-readable facts	May enable enhanced search features

Common misconceptions

• It improves ranking directly. Google states that the description is not a ranking factor. Indirect effects, such as a higher click rate from a clearer snippet, are widely discussed, but the extent to which search engines use click behavior is disputed.
• It always appears in results. Search engines choose snippets per query and may substitute page text.
• There is a strict character limit. Displayed length varies, and text beyond it is simply truncated.
• It replaces the keywords tag. The two elements have different histories and treatment.

Current status

The meta description remains part of standard HTML practice and is supported by all major search engines. Its role is limited to snippet generation and previews, and search engines continue to reserve the right to display other text. Specific display lengths and snippet behavior may change, so current documentation from each search engine is the authoritative reference.