Multimode fibers have large cores, usually either 50μ or 62.5μ. They are able to carry more data than single mode fibers though they are best for shorter distances because of their higher attenuation levels.
It is about as simple as that. Now you know about single mode vs multimode.
A variety of single mode and multimode products exist by Timbercon. Whatever you need for your Fiber optic project, we can assist you. Call for a free and quick quote.