A preprint is a version of a research manuscript published before peer review. Typically these documents and made freely available on large databases - preprint servers or repositories. Publishing a preprint aims to speed up the process of disseminating research, u to generate a conversation around your research and gain feedback from others.
Preprints have a number of benefits:
MDPI is one of the few publishers to develop a preprint server.
"Started in August 1991, arXiv.org (formerly xxx.lanl.gov) is a highly-automated electronic archive and distribution server for research articles. Covered areas include physics, mathematics, computer science, nonlinear sciences, quantitative biology, quantitative finance, and statistics. arXiv is maintained and operated by the Cornell University Library with guidance from the arXiv Scientific Advisory Board and the arXiv Member Advisory Board, and with the help of numerous subject moderators."
The preprint server for health sciences.
"Caution: Preprints are preliminary reports of work that have not been peer-reviewed. They should not be relied on to guide clinical practice or health-related behavior and should not be reported in news media as established information".
Get Ready to Preprint (checklist)
Point or view: Priority of discovery in the life sciences eLife
Ten simple rules to consider regarding preprint submission