The phrase "have a use" can be synonymous with several other phrases, such as "serve a purpose," "be beneficial," "be of value," "be valuable," and "be helpful." Each of these phrases suggests that something has value or usefulness and can be utilized to achieve a specific goal or objective. Similarly, "have a use" implies that an object, idea, or action has a practical application in some way. Whether referring to tools, skills, or knowledge, the phrase "have a use" conveys the idea that whatever is being referenced is worth keeping or utilizing in some capacity.