(Translation: English version of Italiano version)
In Being and Time Heidegger uses the Aristotelian distinction between Poiesis and praxis to identify two different ways of being of Dasein, that is, of man: inauthentic existence and authentic existence. While both are practical activities, in one, Dasein does not reveal itself, in the other it reveals itself to itself.
Praxis and Poiesis are 2 of the The 3 forms of activity according to Aristotle.
Inauthentic existence
It does not mean a life devoid of values or immoral, but a life based on what Plato defined as Doxa. In this type of existence, man uses the tools he finds but according to poietic activity, becoming completely dependent on the tools themselves. Think for example of the car: we rely on its functioning until it breaks down and does not allow us to keep the commitments made.
In this framework:
Important
Dasein disperses itself in the means it uses.
To remedy this sense of dispersion, the person relies precisely on Doxa.
This is contrasted with Authentic existence.