Basically: "l'achat de bons produits" = "the purchase of good products" "l'achat des bons produits" = "the purchase of the good products"
This helped me sort of understand it when I did french a level: https://www.lawlessfrench.com/grammar/de-vs-du-de-la-des/ Make sure to click on the hyperlinks on the website as it takes you to separate pages with more info on different scenarios of de, du, de la etc.
Basically: "l'achat de bons produits" = "the purchase of good products" "l'achat des bons produits" = "the purchase of the good products"
This helped me sort of understand it when I did french a level: https://www.lawlessfrench.com/grammar/de-vs-du-de-la-des/ Make sure to click on the hyperlinks on the website as it takes you to separate pages with more info on different scenarios of de, du, de la etc.
Ahh thank you, defo will check out the website ,, this has been stressing me out !