ResearchGate is a for-profit, professional network site for researchers and academics:
The RG Score measures scientific reputation based on how your work is received by your peers. RG Score is calculated based on any contribution you share on ResearchGate or add to your profile, such as published articles, unpublished research, projects, questions, and answers.
RG algorithm looks at how your peers receive and evaluate these contributions, and who they are. The higher the RG Scores of those who interact with your research, the more your own score will increase.
The algorithm and criteria included is not transparent so not clear how the final RG score is calculated. Therefore the RG Score is considered a metric that is "intransparent and irreproducible"
O’Brien K. (2019). ResearchGate. Journal of the Medical Library Association, 107(2), 284–285. https://doi.org/10.5195/jmla.2019.643PMC6466500/
Kraker, P., & Lex, E. (2015). A critical look at the ResearchGate Score as a measure of scientific reputation. ASCW’15. https://pdfs.semanticscholar.org/cdc5/502781ba22e091e7e058e7cbd2066e335adc.pdf