This is a flat model, or product families, or standalone variant products, etc. Sometimes the result of ERP software not having a hierarchy system . Search the forums for those terms to find posts I and others have discussed. Note the terms/words used are loose with this type of product information architecture setup since shopify is variant centric so makes research hard for beginners.
Shopify has storefront filtering that can use variant options for online-store-2.0 compatible themes
https://help.shopify.com/en/manual/online-store/themes/customizing-themes/storefront-filters
Or can be added to themes
https://shopify.dev/themes/navigation-search/filtering
- for Google Shopping ads, the user is taken to a more precise product and they know this before they click.
This is one reason some businesses go through route singular specific urls either for marketing, web urls, or for use with channels like facebook/instagram etc.
Perhaps to a filtered collection that shows all the products/colors?
This is part of the catch once users are on your website they need to be able to easily navigate between that canonical products sub products. Putting them all into a collection that matches the title/handle of those products is one way.
I’d be changing the handles to include color so I’d have a redirect from the original handle to one of the new handles. I’m thinking I’d redirect to the most popular variant but would you do something differently with the redirect?
Or leave the canonical product as a jumping off point to the other sub product options.
ala https://help.shopify.com/en/manual/online-store/themes/themes-by-shopify/vintage-themes/customizing-vintage-themes/add-pick-an-option
What are the downsides a) for users and b) for SEO?
Downside for users if you don’t customize your theme right navigating between options is annoying.
As for SEO you want to avoid duplicate content so you may want to have 1 product be the canonical/prime product all others point too. Or not it’s highly dependent on goals and each businesses setup , consult a SEO specialist.
Is it worth doing this?
If you have a legitimate business reason and the accompanying budget to validate all your assumptions that’s the only way to prove worth.