Final answer:
In policy, advice based on best practices for achieving security goals that are not mandatory is known as recommendation. Recommendations provide guidance and expertise to decision makers in developing policies and strategies.
Step-by-step explanation:
In policy, advice based on best practices for achieving security goals that are not mandatory is known as recommendation. Recommendations are suggestions made to decision makers to help them make informed choices and achieve desired outcomes. These recommendations are not legally binding but are often based on extensive research and analysis. They provide guidance and expertise to decision makers in developing policies and strategies.