LinkedIn is a pioneering business social networking website. One of the most popular social networks for business professionals to connect with contacts and on some occasions make new contacts.
Groups on LinkedIn provide a way for you to connect and collaborate with other members who have common interests. Many brands and businesses use LinkedIn group as an uninterrupting way of marketing. Users can choose to keep track and participate in the discussion when they feel it’s most appropriate.
Promoting your group through Linkedin:
Create a LinkedIn group with a good description and your logo.
Make sure to tell users if it is an official or unofficial group for your Brand or Business. Users should know if they can raise their voices on this group and more importantly if it is worthwhile their time
Send Invitations to your current LinkedIn contacts. Simultaneously, add discussions/topics to the group
Add content to the site via Announcements, Discussions, News and Jobs. Use Announcements if you want all your members to get an email instantly about something important to your group. Discussions is where you can start a conversation with your members and get them to add content to your group. News as the name suggests allows users to keep track of the latest, although the neat feature here is that you can update users by including a RSS feed of another site.
So for instance if your company/brand has a blog you can post the URL. SO use Linkedin Groups to market yourself, your ideas, your brand, your products or your company.