For getting your research out there before peer review
Posting your submitted manuscript to a preprint server can help you achieve greater visibility and feedback on your research earlier than the often lengthy period of peer review.
Many journals allow the option to submit your manuscript to a preprint server prior to acceptance. Preprint servers are rapidly growing as an acceptable method to disseminate research prior to formal peer review. Funding agencies often support preprints because it allows authors to receive credit for completed research prior to formal acceptance for publication. Preprints also stimulate greater discussion and feedback on research currently under review for authors to consider alongside formal peer review. (Sarabipour et al., 2019)