Not everybody is 'active' in the job market but many people are curious about what other roles, employers and compensation are available to them. In the current state of what is a highly competitive recruitment market that relies increasingly on LinkedIn, one of the easiest ways to achieve this information is to create a LinkedIn profile.
With as little information as your current job title, employer and 25 words about your position, you will be approached about new positions. Of course, the more information you provide, the greater the accuracy and relevance of the proposed role. It is a very quick and almost effortless way of finding out what is available to you.