In Twig, the {% extends %} tag is used to inherit and extend the contents of another template. In the case you provided: {% extends "filed--text.html.twig" %}This means that the current template is extending the content of the template file named "filed--text.html.twig." The contents of the extended template will be used as a base, and the current template can override or add to specific blocks defined in the base template.   A breakdown of the elements {% extends "filed--text.html.twig" %}...