We endorse the articles in various research areas. At the same time we can not approve the text, but can approve the structure of the paper. Especially if it is a literature review. That is correct.
Thank you for the question - well, the papers that I included were APPROVED and published...
I do not think we can endorse articles, but we might be able to endorse members of our community through endorsing them for skills suggested by research gate.
@Vyacheslav, each of us put his own papers and other contribution at research Gate, so become exposed to the public professional assessment, peer review...! We endorse articles as well as skills that have been used in these articles!