What is a sub user account?

The sub-user account would be the person you allow to access your forms and submissions. This can be limited to certain number of forms with or without access to submission. The person you want to give access to your form must have a JotForm account too. 

Please take note that you can only have 1 sub-user account, as a free plan subscriber. You can increase that to 3 sub-user account if you're a bronze plan subscriber, please check our pricing page plans.

Also, please check this related guide: How-to-share-forms-with-a-sub-account-user

Hope that helps. Do let us know if you need any further clarifications. Thank you.