Social Media can be a useful resource to a job seeker. He/she can find out this way about job openings, the profile of the hiring companies, interviewers, etc. If you are an entrepreneur you can use Social Media to promote your business and products.
Don’t be silent or invisible online, it may be a disadvantage. You need to engage on social networking sites to increase your visibility and thus you will be found by prospective employers or customers. Social networking communities and group discussions can be helpful in expertise and information sharing, so be active and make yourself known.