Is the WordPress excerpt used as the meta description?
Not by WordPress itself. Core never prints a meta description tag, so the excerpt goes nowhere near your page's head without a plugin or theme. Most SEO plugins, however, use the excerpt as the description when you have not written one, so in practice the two are often linked.
What the excerpt does in core
The Excerpt field in the post sidebar is a summary for use inside your site. WordPress shows it:
- on the blog index, category, tag, author and date archives, when the theme displays excerpts instead of full content;
- in your site's internal search results;
- in the RSS feed, if Settings → Reading is set to show excerpts for each post in a feed.
If you leave the field empty, WordPress makes one on demand: it takes the post content, removes shortcodes and HTML, keeps the first 55 words and adds […]. That automatic excerpt is never saved; it is recalculated from the content each time.
What core does not do is put either version in the page head. View the source of a post on a site with no SEO plugin and search for name="description". There is nothing there. Without a description tag, Google writes the snippet itself from the page content, which it is free to do anyway.
Where plugins connect the two
Since core leaves the tag out, something else has to print it, and that something decides what goes in. The common order of preference is:
- the description you typed in the plugin's own field for that post;
- a template, which often includes the excerpt;
- text taken from the start of the content.
Hydrogen SEO works this way. Each post has its own description field in the SEO settings sheet. When it is empty, the description template for the post type applies, and for posts that template is %excerpt% by default, described in SEO titles and meta descriptions. So on a site running it, a hand-written excerpt does become the meta description unless you override it per post.
Some themes also print a description from the excerpt. If a theme and a plugin both do, the page has two description tags, which is worth fixing: see duplicate meta output.
Excerpt and description are written for different readers
They can share text, but they have different jobs.
| Excerpt | Meta description | |
|---|---|---|
| Read by | A visitor already on your site, choosing between posts | A searcher on a results page, choosing between sites |
| Appears next to | Your other posts | Competitors' results |
| Length | Whatever your layout suits, often 20 to 40 words | Cut by pixel width; Google sets no fixed character count |
| Should do | Tease the post | Answer the query and give a reason to click |
A visitor on your blog index already trusts the site, so "Three things we got wrong about cold brew" works as a teaser. On a results page that same line says little about what the searcher will get. A description does better when it states plainly what the page covers and for whom.
A single well-written summary can serve both on many posts. For pages that matter commercially or already rank, write the description separately.
A workable routine
- Write an excerpt for every post. One or two sentences that state the subject plainly. Your archives improve at once, and with an excerpt-based template your descriptions do too.
- Avoid relying on the automatic excerpt. The first 55 words of an article are often a greeting or scene-setting. As a description, that wastes the space.
- Override on important pages. Type a dedicated description where you want control. Check its width with the meta description length checker or the SERP snippet preview.
- Pages have no Excerpt field by default. WordPress enables excerpts for posts but not for pages, so for pages the plugin's description field or a different template is the route.
- Confirm what is printed. View source, find
name="description", and make sure there is exactly one and it reads as intended.
Remember that the tag is a suggestion. Google's documentation says it may use the meta description for the snippet when it describes the page better than the on-page text, and it often chooses other text to match the query. A good description improves your odds; it does not fix the result.
Common mix-ups
"I wrote an excerpt but Google shows something else." Either no plugin is printing it as a description, or Google preferred text from the page for that query. Check the source first.
"My archive pages show the meta description." Some themes print the plugin's description in listings. That is a theme choice; the excerpt is the field meant for listings.
"The excerpt has a […] in search results." The automatic excerpt was used as the description. Write a manual excerpt or a description for that post.
"Category pages have no excerpt." Terms have a Description field instead, which plays the same role for category and tag archives.
Common questions
Does WordPress add a meta description without a plugin?
No. Core prints no description tag. A theme or SEO plugin has to add it.
Does a manual excerpt improve SEO by itself?
Only indirectly: it improves your archive pages, and it becomes the meta description if your SEO plugin's template uses it.
How long is the automatic excerpt?
The first 55 words of the content with HTML and shortcodes removed, followed by […]. Themes and plugins can change the length.
Should the excerpt and meta description be identical?
They can be on ordinary posts. On pages that compete for valuable queries, write the description for searchers and the excerpt for site visitors.