Coriander plays a central role in the gin world, and is the second most used botanical after juniper. It is actually quite rare to find a gin that doesn’t have coriander seed. That said, its tone is usually nuanced. The plant has a complex flavour once distilled, all at once citrusy, nutty and a little spicy.
Typically, in a gin, the flavour of coriander seed is more discernable towards the end of the flavour journey. If a gin has citrus, these elements will come off upfront while the citrusy nature of coriander seed will present itself thereafter –towards the heart / end of a gin.
Check out this link for some info on ratios and some recipe ideas. https://www.lovebrewing.co.uk/guides/gin-recipes-using-botanicals/