You don't have to have a box spring.But its good to have one.
It depends on your bed frame. Some frames are basically just rails down the side and possibly a couple of slats running across; these need a rigid support like a box spring. However, if the frame is capable of supporting a mattress by itself, you don't really need the box spring.
There should always be a few slats placed accross the bed frame before putting your box spring on. They are supports to your box spring.
It really depends on the size of your bed. If you have a full or queen size bed a king size or Cal King duvet cover might be able to cover the box spring. I recommend getting a bed skirt which will fully cover the the box spring.
A box spring is not always necessary for a mattress, but it can provide additional support and extend the lifespan of the mattress. It ultimately depends on the type of mattress and your personal preference.
A box springs and mattress will last longer if they are on a bed frame. They can sit directly on the floor if desired however and be just fine and comfortable.
No.
They don't. If you use box spring foundations, you need to use the right size.
i really do not know and i need help ugh
It's good to get a box spring that comes with the mattress which is matched to work perfectly together.
Upgrading the main spring can help make an out of the box marker better.
A low profile box spring is a box spring of minimal depth used on platform beds where a regular box spring would cause the bed to sit higher than desired.
Some of the best options for a full size mattress that does not require a box spring include platform beds, adjustable bases, slatted bed frames, and bunkie boards. These options provide support for the mattress without the need for a traditional box spring.