The term 'SERVED THE PURPOSE' can be summarized as 'fulfilled the goal'. This phrase is often used to describe when a task or job has been completed successfully, meeting the expectations of the person or people who assigned it. The three-letter word 'DID' is a verb that means 'to perform an action or duty'. Therefore, the phrase 'DID SERVED THE PURPOSE' can be interpreted as 'performed the task and achieved the desired outcome'.