A Virtual assistant performs many different services based on our clientele.   There are general VA's that perform a variety of services , such as phone work, and general office work.  There are also what are referred to as Niche VA's who focus on certain industries.   They include legal , medical , which involves transcription of documents and REVA , or real estate  VA's   Other than transcription, you don't need special training.

General VA's offer services in document preparation, data entry, internet research and Microsoft Office work. Some of them also do phone work, website design ,SEO and social media.  A few also offer special services like notary public and event planning.

How do you know which one is right for you?  Like anything you research and find out who meets your needs as well  as your budget.