Hoarding is when someone collects and keeps a lot of things that they don't need or use. Many times the things are things like old newspapers, magazines, boxes, clothes, and more. They hold on to these things even though they don't use them anymore, and they keep collecting more even though their home is already full of stuff. It is like collecting too much and not getting rid of it. This can be a problem because it can take up space that could be used for other things, and it can be hard to move around in a home when it is full of stuff.