LinkedIn is one of the most popular social networks around (alongside Facebook, Twitter, Google+, and Pinterest). It targets business professionals who want to build up their network and use the community to further enhance their career and reputation. LinkedIn is capable of driving a decent amount of traffic to your site depending on what you cover. Adding LinkedIn to WordPress is fairly easy. The site already has a bunch of tools you can use for that. These 15 LinkedIn plugins are helpful as well:
Social Sharing Toolkit: adds social share buttons for Facebook, Twitter, LinkedIn, and other top sites to WordPress.
Social Network Tabs: combines all your favorite networks’ feeds/profiles and displays them in an attractive fashion on your site.
Top Social Share Posts: a cool plugin that tracks and updates your post counts from Facebook, Twitter, Google+, LinkedIn, and many other sites. It helps your visitors find your most popular posts faster.
LinkedIn Share Button: adds the LinkedIn Share button to your website. You can choose where this shows up.