How did Edmund Husserl influence Martin Heidegger’s early work?

Edmund Husserl, the founder of phenomenology, significantly influenced Martin Heidegger’s early work by providing him with a rigorous philosophical method. As a student of Husserl at the University of Freiburg, Heidegger learned the technique of phenomenological reduction.12

This method involves setting aside inherited preconceptions, scientific assumptions, and metaphysical theories to describe the essential structures of conscious experience as they are directly given. Heidegger adopted this principle—that philosophy should be a self-evident insight into the structure of experience—and applied it to his own investigations of human existence.12

While Heidegger became the heir apparent to the phenomenological movement, he adapted Husserl’s approach to analyze the being of humans, or Dasein (“being there”). By utilizing the phenomenological method, Heidegger sought to "dismantle" traditional Western metaphysics, moving away from egocentric epistemology to define the human individual as a "Being-in-the-world," fundamentally caught up in worldly commitments and projects.13