hugo/docs/content/en/methods/page/Summary.md

title	description	categories	keywords	action
Summary	Returns the content summary of the given page.			related returnType signatures methods/page/Truncated methods/page/Description template.HTML PAGE.Summary

There are three ways to define the content summary:

1. Let Hugo create the summary based on the first 70 words. You can change the number of words by setting the summaryLength in your site configuration.
2. Manually split the content with a <--more--> tag in markdown. Everything before the tag is included in the summary.
3. Create a summary field in front matter.

To list the pages in a section with a summary beneath each link:

{{ range .Pages }}
  <h2><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></h2>
  {{ .Summary }}
{{ end }}