Multiple Representation

What is Multiple Representation? 
"Multiple representation means that a brokerage is representing both the seller(s) and buyer(s) of a property. There are no standard terms of services under multiple representation so you need to refer to your representation agreement before any offer is submitted. RECO can’t provide a legal interpretation of your contract. However, multiple representation must be consented to in writing. When such a situation arises, ask questions and make sure you are comfortable with how it may affect the services provided to you."