The topic for this year's school is Gravity and its different manifestations. Following the outstanding success of the detection of gravitational waves by LIGO, we will address various aspects of Gravity as opportunities and challenges for probing fundamental physics. The YETI school serves to promote interaction between theorists and experimentalists at the early career stage and to encourage interest in phenomenology. YETI aims to give a pedagogical introduction to a particular area of topical interest in particle physics. A key feature is the hands-on sessions in the afternoons.