Final answer:
After keeping a caller on hold, it is good customer service to check back with them after 30 seconds to inquire if they wish to continue waiting.
Step-by-step explanation:
When managing phone calls professionally, it is essential to maintain a balance between keeping a caller on hold and attending to their needs promptly. The question pertains to the appropriate duration to keep a caller on hold before checking back with them. If you must keep a caller on hold, it is considered good customer service to go back on the line after 30 seconds and ask the caller if they wish to continue holding or take another action, such as leaving a message. This duration strikes a balance between giving the handler enough time to address the reason for the hold without making the caller feel forgotten or undervalued.