Definition
A preprint is a draft of a research paper that is shared publicly before it is peer reviewed and published in an academic journal. Preprints are posted on publicly available online preprint servers. Normally preprints are assigned a DOI (digital object indentifier) so they are easy to track.
Benefits
CAVEAT
Some journals may not accept article submissions for research that has been published as a preprint. Before posting a preprint check the following resource to determine the publishing policies for journals that are being considered for article submission.
Also check funder policies regarding preprints.
Preprinting guide
Citing preprints
Recommendations for authors
Authors should choose preprint archives that have the following characteristics: