LinkedIn offers a number of applications (apps) for members to connect with other members and promote their expertise. Four that I think are especially valuable for attorneys are:

Events
The Events application adds a box to your profile that shows what events people in your network are attending. This helps you find events based on your industry and job function. You can sort by most popular events, search for events, and create new ones.

Answers
LinkedIn Answers is a tool that allows you to ask questions and answer inquiries posed by other members. It is a valuable place to share knowledge and expertise. To try it, click on the “Answers” tab.

Groups
Nearly 18 million members are a part of LinkedIn Groups, with 1.5 million joining groups every week. Groups are an opportunity to participate in conversations that are relevant to your firm’s practice areas and to answer questions that match your expertise.

SlideShare
With this app, you can share presentations and documents with your LinkedIn network and upload PDFs, presentations, video or more. You can also browse and comment on the presentations of others in your network, and see the latest presentations from your network on your homepage.