B visa

What are the benefits of getting a B visa when compared to rest of the Visas.
Benefits of a B visa? Every visa serves its own purpose. So comparing visa “benefits” would be a fruitless task.

If you’re looking to just visit the US, then the B visa would be for you. If you’re looking for anything beyond that, then you’d have to consider a visa type that suits your needs.
 
Benefits of a B visa compared to which other visas? You do realize each visa type has a specific purpose for which they get issued?
 
My mother 87 years old does not required an interview, but my sister is only 59, should I request their visas separate or as a group? Would this delay my mother's visa because she has to wait for my sister visa if I do it as a group? They are asking for a B-2 visa.
Thanks,
 
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