BIMobject is a free service that provides THOUSANDS of symbols created by the actual manufacturer of the objects/products. As such, the objects that you can import into your drawings are as accurate as possible, adding details and richness to your drawings and models.
The easiest way to use BIMobject's symbols in Vectorworks is to use the BIMobject tool is available within Vectorworks 2017 Architect or Designer SP1 or newer. This web page provides more information about how to use the BIMobject tool.
This is how you use BIMobject with Vectorworks:
This is how you search BIMobject's website for symbols:
And if you would like to see Vectorworks' VP of Integrated Design Robert Anderson's talk at BIMobject Live (Nov 2016), it is below. It contains an interesting history of Vectorworks as well as a description of how BIMobject fits into workflows.