SMS marketing is one of the most popular direct forms of modern days marketing techniques - for the reason, it is effective, affordable, at the same time flexible.
LinkedIn don't provide contact information for companies but there are some tools that extract companies information and find contact information based on extracted information.
LinkedIn is the most professional of the major social networking websites. It is a platform for more than 80% of a business's social media leads! And, since it is largely focused on B2B connections, LinkedIn must be considered part of social media marketing strategy.