Unlike most physical offices, it is not something you can see and work in but instead is an alternative bundle of support services.
Virtual offices are merely a set of services designed to support the needs of businesses looking to obtain a physical mailing address along with occasional conference room use.
Virtual offices are often a good alternative to a traditional office as it saves money on rent and still provides you with a business address, professional phone answering and secretarial support to help maintain your professional image.