Preparing a provisional patent application online enables you to protect your invention and claim legal rights even before it is finished. It comes in handy when an invention is certain but will likely require additional improvements that can be completed within a year.
It is essential to finish the innovation within a year so that the original invention detailed in the online provisional patent application can be used before it expires and so that the non-provisional patent can be submitted with enhancements. It basically provides time and protection for the applicant.