You need credits for posting jobs.
Credits for posting Standard jobs are free where as credits for posting premium jobs come at a price.
Your job will only be posted to the site if you have enough credits in the respective job edition. If you don’t have 0 credits then you will only be able to fill out the form but your job would not be posted to the website.
The number of credits available to you are displayed in brackets next to the job editions.
In this case your job would be saved as a draft. Job seekers won’t be able to see your job in the listing.
When you purchase credits, it will be posted to the website.
If you have enough credits already, the job will be submitted to the system admin. Pending approval from the admin, your job would be posted to ISP platform. Only then job seekers would be able to see your job and apply for it.