An excerpt is a small part of a single post, that links to the full article. It is used to attract the interest of your readers and make them more willing to press the read more button, in order to read further about your posted article in your blog. It helps to highlight key points of your content, as sometimes a title is not enough to get your audience’s attention. By default, WordPress uses a small piece of text around fifty-five (55) words, but this can easily change to any number you like.