It allows the ground coffee to be distributed homogeneously inside the filter, eliminating the air that is between the product.
In this way, we get the coffee to be more compact and, consequently, we cause the water to need more time to penetrate the solid tablet of the ground coffee and increase (slightly) the extraction time of our espresso.
By pressing the coffee gently but firmly, we get a cup with more body and more creaminess, otherwise, the water would be able to pass through the coffee tablet more easily and we would have an espresso that is very watery, without strength and, above all, bitter.
It allows to obtain a cup of espresso coffee with the ideal body and smoothness.
