LinkedIn is a social network for professionals with over 34 million members. It allows members to find people they know, share updates, find jobs, make business connections, and get news and advice. Advertisers on LinkedIn can use tools like company pages, targeted advertising, polls, discussions, and partnering with influencers to engage with professionals on the site. An example campaign by Banana Republic gave LinkedIn members incentives to improve their profiles and passed along the offer virally, engaging over 77,000 members.