We hate to break it to you, but Facebook is the king of social marketing, and it will be for a long time. Facebook has more users, and a wider variety of users, than any other social platform. It offers a wider variety of engagement options, hence more nuanced feedback for marketers. And those are just scratching the surface.
The more distinctive something is about your brand, the more you should talk about it. Yet many companies are reluctant to talk about their brand, products, services and company. But that's what people want to see in advertisements. It's why people follow you on social media. They like your stuff and want to know more.