Why should the sofa be placed against the wall? What are the feng shui requirements?

It is best to place the sofa against the wall, not facing the passage, and not having no support behind it. From a Feng Shui perspective, if you lean against the wall, you will have a backing and no worries. If there are doors, windows, or passages behind the sofa, and there is no wall to lean on, it will create a situation of leakage, and it will be difficult to prosper people and money. The remedy is to place furniture such as screens and low cabinets behind the sofa to artificially create a backing. The situation is slightly better.

——House Friends Circle