A teaser is a short summary of a piece of content in Drupal, such as a blog post, article, or page. It is typically displayed on the front page of a website, or in a list of content, and is used to give visitors a quick overview of the content before they decide to click through and read the full article. Teasers are usually limited to a few sentences or a paragraph, and may include an image or other media.
In Drupal, teasers are created using the Teaser field, which is a field type that can be added to content types. This field allows the author to enter a short summary of the content, which is then displayed as the teaser. The Teaser field can be configured to allow for a certain number of words, or to allow for a certain number of characters. It can also be configured to allow for HTML formatting, which can be used to add images or other media to the teaser.
Teasers are an important part of Drupal content, as they provide visitors with a quick overview of the content and can help to draw them in to read the full article. Teasers can also be used to highlight certain content, such as featured articles or blog posts.