This is where you can control your "job duplication" which is sometimes also referred to as "job extensions." Duplicated job titles only related to paid media job feeds, not organic, as duplicated job titles are not permitted in organic job results.
Job duplication is just a matter of creating a rule, for example if you have a job title that isn't commonly searched for like "Team Director" and it's really a "Sales Director" role, that (extreme example) could put you at a large competitive disadvantage as the right candidates will not be searching for and finding your jobs on job sites. By duplicating that title out to read as "Sales Director" we're able to extended the traffic acquisition approach. This helps us to drive much higher levels of traffic for the same amount of money because the supply & demand nature of the jobs-bidding marketplaces favors a large content-supply, in other words, a larger number of jobs to sponsor that can then show up in more searches, reducing the click bids needed to fully deliver budgets, and naturally driving down the Cost Per Application and Cost Per Hire.
Additionally, job duplication can be leverage to duplicate jobs in additional locations. For example a "Work From Home" position is location-agnostic, so we can duplicate this position into hundreds of jobs, and then analyze what locations are driving the most and best quality applications, to use that data and hone down the buying strategy, which saves us from wasting dollars nationally in geographic markets that don't make sense. Travel Nurses is another common use case. Still another use case is duplicating jobs in close but better known cities. For example a call center job in Ogden Utah, just outside of Salt Lake City - it may make sense to duplicate that job out and list it in sponsored results within Salt Lake City also. Call centers are a great example because there is often only 1 "req" for which maybe 50 people in a class of people need to be hired at all levels. We can capture those levels, and show up in more searches, "Call Center Representative" "Customer Service Associate" "Senior Customer Support" "Bilingual Call Center Representative" and so on, and then, even duplicate all those job titles in 2 very nearby cities, to really "cast a wide net" when a lot of job seeker volume is needed quickly.