Which feature in Campaign Manager allows reaching professional audiences on third-party apps?

The LinkedIn Audience Network is the correct choice because it enables advertisers to extend their reach beyond the LinkedIn platform to third-party applications and websites. This feature allows advertisers to access a broader spectrum of professional audiences who may interact with these external platforms while still targeting them based on professional characteristics and job-related criteria. By incorporating this feature, advertisers can effectively engage users where they spend additional time online, thus enhancing brand visibility and engagement with their target demographic across diverse digital environments.

The other choices refer to different capabilities within LinkedIn's advertising offerings. Sponsored Messaging allows users to send direct messages to LinkedIn users' inboxes but does not extend to third-party applications. Dynamic Ads are tailored to engage users on LinkedIn through personalized advertising but are confined to the LinkedIn platform. Content Suggestions assist in curating relevant content for audiences on LinkedIn itself, rather than reaching them across third-party applications.