Posting a preprint of your article on ResearchGate can have several benefits:
Increased visibility: By posting a preprint of your article, you can increase its visibility and accessibility to a wider audience. Other researchers in your field can discover your work and potentially cite it in their own research.
Early feedback: Posting a preprint can also provide you with early feedback on your research. Other researchers can read your work and provide comments or suggestions, which can help you refine your ideas and improve your paper.
Priority and credit: Posting a preprint can establish priority and credit for your research. By making your work publicly available, you can demonstrate that you were the first to publish the findings.
Expedite the peer-review process: Some journals allow authors to submit papers that have been posted as preprints, which can help expedite the peer-review process. Reviewers can read your work and provide feedback faster because they may have already seen it on the preprint server.
Regarding the issue in publishing online later on, some journals have policies against publishing articles that have been previously published, including preprints. It is important to check the journal's policies before submitting your paper to make sure that posting a preprint will not affect your ability to publish it in a journal later on. Additionally, you may need to make sure that you properly attribute your preprint in your journal submission to avoid any issues of plagiarism or duplicate publication.