In this video, Jemima, the product marketing manager of Salesmsg, introduces PhoneCheckr, a powerful tool developed by Salesmsg. PhoneCheckr helps users identify the type of phone numbers, whether they are mobile, landline, or VoIP. Marlandi demonstrates how to use PhoneCheckr by uploading a CSV file and selecting the phone column to determine the carrier type. The process is quick and efficient. Users have the option to choose between a free or paid report, and upon selecting "Get Reports," they enter their email address to receive the results. The report provides detailed information about the carrier type for the selected numbers. Marlandi encourages viewers to follow Salesmsg for more helpful tips.