The term "hand side" refers to the part of something that is closest or most easily accessed from the perspective of someone standing on a particular side. It can be used in various contexts, such as describing the location of objects relative to each other, or indicating which direction one should go from a starting point. For example, if you are standing at the bottom of a set of stairs and want to reach an object that is located on the "hand side" of the staircase, it means that you would need to climb up the steps in order to access the object.