Is there a point where it can run on auto-pilot, or is it dynamic, changing & adjusting forevermore?
UTM Tracking - You might choose to use UTM tracking, which can be setup in the settings of an account, campaign, or ad group.
It is likely that LinkedIn campaigns to warm leads (aka remarketing) could be a good fit, but LinkedIn campaigns to cold leads is only a good fit for a few narrow industries.
What to expect with Competitor Campaigns - You might decide to target the clients’ competitors.
Some potential reasons are you are in a competitive industry, you have other key phrases that have proven to convert, there's low search volume, and where you are searching (Google) from.