A non drafted provisional application provides the means to establish an early priotiy date. It allows filing without any formal patent claims, declaration or any information disclosure (prior art statements). Such applications enable inventor to put 'Patent Pending' on his products. If provisional application is fully drafted it allows the inventor to have a better claim over his invention in view of potential infringer. He can claim his invention in a wider manner.

To avoid being drafted.

what do you do if you lose your provisional licence

what are the uses of provisional appropriation

A provisional driver is one until they complete the full requirements.