What is not allowed to be sold on Marketplace?

I'm curious, could you elaborate on what items or services are specifically prohibited from being sold on the Marketplace? It's important for both buyers and sellers to understand the boundaries to ensure a SAFE and compliant trading environment. Are there any categories of goods, such as illegal substances or counterfeit items, that are explicitly banned? Additionally, are there any services that fall under the umbrella of unethical or immoral practices that are not permitted to be offered for sale? Clarifying these restrictions would greatly contribute to maintaining the integrity of the Marketplace.