Am I doing my keywords right?

i am adding keywords to my products. am i meant to only put words that are associated with that specific product or do i add keywords that are associated with my whole website?
for example, on a website selling lingerie, i have a product which is a lace bra. when creating keywords for this product would i only add keywords that describe this particular lace bra, ie lace, bra, white, bridal, lingerie, large cup.... or would i also add additional keywords such as silk, knickers, corset,...

Am I doing my keywords right?

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