In de mod description there is a section on recommended planets. What is meant by recommended here? Is the mod less fun or badly balanced without them? Or is it more an optional enhancement that is compatible with the mod? As someone not well versed in the intricacies of Krastorio I read recommended as "it's better you install these of you want to play Krastorio"

K2SO is a mod that works well standalone, but recommendations are additional content that i tested and i think work well with it

In that case, the clarity might improve if that section is rephrased to Author's suggestion or Compatible planet mods. Under the current name: Recommendations I would be inclined to install all planet mods listed there.