The company is testing ads for now.
Linkedin's audience is moving toward mobile, Techcrunch reports:
LinkedIn says that 27% of its 155 million monthly users visit LinkedIn via mobile apps (up from just 8% two years ago); and weekly mobile page views have jumped 250% year-over-year. So while users typically only stay in the mobile app for 2 or three minutes at a time, there are a lot of them doing that, day in and day out.
You can see images of the new ad formats over at Mashable.
And here's a walkthrough of the entire new app environment.