To add content to a LinkedIn campaign:
- Navigate to Reports > Ads.
- At the top of your Ads Dashboard, click the Manage tab.
- Click on the name of the campaign you wish to modify to open it.
- In the campaign overview, click on the blue Add content or edit campaign button in the upper right corner.
- Select the content you wish to promote, as well as your audience and budget, and follow through the Next prompts until you're happy with your changes.
- Click Done on the review screen to finish.