The term "changer" can have multiple meanings depending on its context.
In a general sense, it could refer to someone or something that causes change or transformation. For example, "He is a changer of hearts and minds." In this sentence, the word refers to an individual who brings about changes in people's emotions and perspectives.
On the other hand, "changer" can also be used as a term for someone who exchanges one thing for another or performs a specific action repeatedly. For example, "He is a money changer." In this context, it refers to an individual whose profession involves buying and selling of different currencies.
In summary, the word "changer" can be used in various ways depending on its usage and context.