Splitting Content »Excerpts
Excerpts are used to shorten your blog posts so that only part of the entry — usually the introduction or a summary of the post — is displayed, instead of the entire entry. Using excerpts is completely optional.
Depending on the theme you have activated, excerpts you assign may be displayed on your homepage, RSS feed, or archives page. Your theme will also determine whether or not your excerpt is followed by a link that points readers to the full-length post.
Here’s an example of an excerpt on the homepage of a blog with the Inuit Types theme:
When you click the post title, you’re taken to the full-length post:
First, write your entire entry as you normally would.
Now use the Excerpt module under the post editor to create an excerpt for the post. If you do not see the Excerpt module, click the Screen Options tab near the top-right when writing or editing a post and make sure that “Excerpt” is checked.
Publish your post. Note that the excerpt feature only works with certain themes. If your theme does not support excerpts, you can use the More tag instead.