The excerpt is a summary or description of a post, WordPress includes an excerpt form field which you can use while creating or editing posts. Usually people forget to set this value, so Single Latest Posts allows you to create an extract from the content of the post.
There are some optional parameters: excerpt_length and excerpt_trail the first one sets the number of words the excerpt should display and the second receives two values, text or image, text is used by default, it adds “…more” to the end of the excerpt’s paragraph. When image is used, it will display the excerpt_trail.png image located inside the plugin’s core/img folder.
[slposts excerpt_length=55] // Limits excerpt length to 55 words [slposts auto_excerpt=true excerpt_length=40 ] // Create excerpt from post content limited to 40 words [slposts excerpt_trail=image] // Set image as a "read more" link