Public Relations & Social Marketing Insight

Professional networking service LinkedIn blasted through the 100-million-user mark in March, making it even more powerful for finding a job, keeping up with colleagues and promoting your resume.

LinkedIn is growing so quickly, it's adding a new member each second. As the size of its network grows, LinkedIn is steadily getting more useful. But how are people really using the fast-growing service? Researchers at Lab 42 asked 500 LinkedIn users that question and many more, and came up with a variety of answers in this infographic.

Among the fun facts they uncovered: We found it interesting the way top level executives use the service in vastly different ways from entry-level workers. Let us know in the comments how you like to use LinkedIn, or if you don't use the service, why not?...