Twitter Deutschland official German Twitter page (2018)

You can only use this image in editorial media and for personal use. Editorial media includes use as a visual reference to support your article, story, critique or educational text. Personal use allows you to make a single personal print, card or gift for non-commercial use. Not for resale.

It shouldn't be used for commercial use which includes advertising, marketing, promotion, packaging, advertorials, and consumer or merchandising products.