Filing a provisional application is a simpler and affordable step for initial patent protection. The inventor gets 12 months’ time before filing the complete specification which is referred to as complete patent in the common parlance. This period gives the applicant enough time to contemplate whether the invention has enough potential to be patented and gauge its feasibility. Changing the decision within these 12 months does not attract any charges/penalties and the applicant can cautiously decide if the investment is worth it. Also in that case, it will also not get published and will not come in the public domain.