Questions pertaining to Blender's built-in cloth simulator. Blender's cloth simulator is accessed in the Physics panel.

Cloth simulation is one of the hardest aspects of computer graphics, it is a deceptively simple real-world item that is taken for granted, but it actually has very complex internal and environmental interactions. Cloth is commonly modeled as 2D mesh to simulate real world objects such as fabrics, flags, banners. And yet cloth can also be used to model 3D objects such as teddy bears, pillows, balloons, or balls.

Cloth interacts with and is affected by other moving objects, the wind and other forces, as well as a general aerodynamic model, all of which is under your control

Blender's cloth simulator settings can be found in Properties > Physics > Cloth

More information can be found at the Manual