The phrase is commonly used in politics, especially when discussing corruption or scandals. For example, a politician may be accused of accepting pro-quid pro payments from lobbyists or special interests. This means that the politician is alleged to have accepted money or other benefits in exchange for advancing the interests of those groups.
Pro-quid pro relationships can also occur in other areas, such as business and law. For example, a company may offer a discount to customers who purchase a certain amount of products. This is a pro-quid pro arrangement because the customers are receiving a benefit (the discount) for their purchase (buying the products).
Pro quid pro can also occur in relationships between friends and family members. For example, a person may offer to help their friend move house in exchange for help with a project. Again, this is a pro quid pro arrangement because each person is receiving a benefit for something they have done for the other.
In some cases, pro quid pro relationships can be considered unethical or even illegal. This is especially true when the exchange is for something that is considered wrong, such as a bribe. However, there are many cases where pro-quid pro relationships are perfectly legitimate and even beneficial.