Social media continue to grow as a go-to source for both job seekers and the employers looking to hire them. FILE - In this Friday, Aug. 17 2012, file photo, Sheila Bird, right, waits in line for employment interviews at a job fair at City Target in Los Angeles. U.S. employers advertised slightly fewer jobs in August than July, while they filled the most positions in three months, offering a mixed signal for the job market.