you might have found pie or even cheesecake recipes that tell you to blind bake your crust. Unfortunately, those recipes don't always explain what blind baking is, and rarely explain why it is ...
Line the crust with parchment paper or foil and fill with pie weights or dried beans to prevent puffing or slumping. Bake until the edges of the crust are very lightly golden, 18 to 22 minutes.
How do you keep pumpkin pie from getting soggy? To avoid a soggy bottom crust, you must blind bake the pie shell until it’s golden and slightly crisp before adding the filling and baking.