What is the origin of the idiom "have a memory like an elephant" and when to use it?

The idiom "have a memory like an elephant" originated from the observation that elephants possess exceptional memory capabilities. It focuses on the idea that someone has an exceptional ability to remember and recall information, experiences, or details with great accuracy and for an extended period. The phrase is primarily used to highlight the impressive memory capacity of elephants in popular culture, emphasizing the idea that individuals who possess a "memory like an elephant" are known for their remarkable recall and retention abilities.