How to Use Robots.txt to block GoogleBot, but not AdsBot

Hi,

I am managing an eCommerce brand that has thousands of products. Some of these products have multiple SKUs (variants in terms of colour). These multiple SKU's use a URL query string parameter to differentiate between the colour variants. Since they are the same product, but only vary by colour, they are all canonicalised to the non-colour version for SEO.

Example setup of products:

Hugo Boss T-Shirt product page (/product/hugo-boss-red-t-shirt) with the below...

How to Use Robots.txt to block GoogleBot, but not AdsBot

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