One of the thing i have come to understand about engaging in a group on social media like whatsapp,telegram is that the leverage of spending little or nothing is a big advantage.For an agent or realtor, I think the best social media platform to advertise properties has to be Instagram, most of the time while I go through Instagram I see a lot of real estate firms put their properties on there and run sponsored post, the sponsored post allow a wide range of users across different countries to see the post. If you have a property for sale just run a sponsored post across the social media platforms and you will definitely get a client.