Twitter has given you unprecedented If your prospects like you on Facebook or follow you on Twitter or LinkedIn, it shows they're engaged in your brand.
Using LinkedIn, you can target everyone based on profile information. LinkedIn lets you create ads based on industry, job role, seniority, and geographic location. For example, suppose you just published an ebook about how to be an awesome CMO. You can target CMOs on LinkedIn. If you have a list of companies, you can put your ads only in front of those companies.