SEO Meta Tags & Robots — HTML

SEO Meta Tags and Robots

Beyond the title tag, a small set of meta tags directly shapes how search engines index and present your pages. This page covers the description, robots directives, authorship, and a preview of canonical URLs.

Meta description best practices

HTML

<meta
  name="description"
  content="Learn how HTML meta tags control indexing, snippets, and social previews — with practical examples for every tag that matters."
/>

Write a genuine, specific summary of the page — not a generic sentence reused everywhere.
Aim for roughly 150–160 characters; longer descriptions get truncated in search results.
Include the primary topic naturally, but never keyword-stuff — it reads poorly and doesn't help rankings.
Every page should have its own unique description.
Treat it as ad copy for your page — its job is to earn the click, not to rank directly.

Robots meta tag: noindex, nofollow, none

HTML

<meta name="robots" content="noindex" />
<meta name="robots" content="nofollow" />
<meta name="robots" content="noindex, nofollow" />
<meta name="robots" content="none" />

Directive	Effect
noindex	Keep this specific page out of search results
nofollow	Don't pass ranking signal through this page's outbound links
none	Shorthand for "noindex, nofollow" together
noarchive	Don't show a cached copy of the page in search results

A page can also target a specific crawler by using its name instead of the generic robots value, e.g. <meta name="googlebot" content="noindex">.

meta name="author"

HTML

<meta name="author" content="Let Codes" />

Declares the author or organization behind the content. It has no direct ranking effect, but is used by some tools and browser features, and is good practice for attribution and transparency.

Canonical URL preview

HTML

<link rel="canonical" href="https://example.com/blog/html-seo-guide" />

When the same content is reachable at more than one URL (with tracking parameters, via HTTP and HTTPS, with and without a trailing slash), the canonical link tells search engines which URL is the authoritative one to index. This tag is covered in full detail on its own page, alongside hreflang for multi-language sites.

Tip

A useful mental model: title and description are written for the human reading the search results page; robots and canonical tags are instructions written for the crawler itself.

Warning

Never let a noindex directive slip into a page you actually want ranked — it is a common accidental regression when staging configuration (which often defaults to noindex) leaks into production.

Note

Robots directives can also live in an HTTP X-Robots-Tag response header — useful for non-HTML files like PDFs, where there is no <head> to put a meta tag in.