Boundaries are simply the limits, rules, or lines we set for comfort. Boundaries are a set of physical and mental guidelines that are established to help protect ourselves when we are around other people and in relationships. Having healthy boundaries is an essential personal skill to help you thrive and communicate your needs. It is vital to set limits so that others don't take. advantage of or manipulate you. For example, a person with solid personal boundaries will feel comfortable saying 'no' when asked to do something they are uncomfortable doing without feeling the need to apologize. Everyone's boundaries are different, so once you set yours it shows others how you expect them to behave around you and vice versa.