With nearly one-quarter of its unique users visiting the site from a mobile device, LinkedIn announced several new mobile features to keep them happy.

A year ago, the site’s mobile users accounted for only 10 percent of its total. Over the last year, the number of LinkedIn mobile users has more than doubled.

New Languages, Real-Time Notifications

The new features, targeted at iPhones, iPads and Android devices, include the ability to get notified in real-time when someone likes content that has been shared, views your profile, accepts an invitation or triggers other parameters.

The revised iPad app supports six new languages -- French, German, Italian, Spanish, Brazilian Portuguese and Korean. Over sixty percent of LinkedIn’s membership is based outside the U.S. LinkedIn said that the ability to edit a profile through the mobile device, which had been repeatedly requested from members, will be coming soon.

When LinkedIn revamped its iPhone and Android apps in April, it focused on Updates, Inbox, You and Groups. Updates show a newsfeed of activity from one’s network, as well as news from the site’s aggregated news service.

Inbox contains messages and requests, and You includes one’s profile, connections and update sharing. Groups allows users to gain mobile access to the site’s groups, usually based around professional interests, as well as to view discussions and post comments.

New Company Pages

Company pages are also now optimized for mobile devices, so that users can see which of their connections work at specific companies and can receive other news and updates from those businesses. Access to job listings has been added to the mobile update stream.

LinkedIn also announced Wednesday that its Company Pages will now have a new look. The redesign is being rolled out, starting with Philips, Citi, HP, Dell and several other major companies.

For users, the new look is intended to simplify the task of finding news, jobs, and other information. For companies, navigation and the update stream have been re-designed so that information about products, services and job opportunities can be more easily shared.