Space Clearing is done to remove and dispel negative or low vibratory energies in your home, office or property that are not conducive to harmony and productivity. It will also attract positive and beneficial energy to the space.
When you have an unpleasant feeling in a physical area, it can be caused by an event that occurred in that location in the past, or there may be an unwanted entity or presence residing there. Energy leaves an imprint, whether pleasant or not.
Another possibility may be that the arrangement of furniture or items is blocking proper energetic flow. For an obvious example, a table that many people bump into and bruise their leg/shins is not in an optimal location and should be moved.
There are various types of clearing that can be performed depending on the specific situation and desired results.