Imperative

An imperative is a sentence type expressing an order or a request:

(i) Tell me about it.

Comments
Imperatives typically lack an overt subject in English, but a subject may appear in German and Dutch imperatives:

(ii) Vertel (jij) me eens hoe dat zit(?) 'Tell (you) me now how it is'

Link
Utrecht Lexicon of Linguistics

Other languages
German Imperativ