Nationwide Mobile Billboard Advertising Platform. Murmur gets your ad across online and offline channels through highly optim ... ized national campaigns driving home your value proposition. From vehicle on top billboards to social media networks, Murmur places your ad where your customer is at attractive costs. Tap into unexplored markets, give your brand trust and transparency through higher reach and clickthrough rates and record higher viewability metrics all with Murmur’s patent-pending ad optimization platform. read more