It's common to have the same core product, but slight variations of it. So instead of creating a new unique product in WooCommerce, you can instead make 1 product, create an attribute, then create variations of it.
Sound confusing? Let me give you an example.
Say you have a shirt design of a panda. For this
In this example, size and color are attributes.
Here is how to set this up in practice, its a full tutorial on WooCommerce, but when you click play it will go to the segment on variations.