Seems authors suggest three reviewers. from the website: [...] suggests three potential reviewers. Reviewers should be: Experts in the subject matter,

Seems authors suggest three reviewers. from the website: [...] suggests three potential reviewers. Reviewers should be: Experts in the subject matter, Disinterested (i.e. not collaborators or personal friends). You do not need to know the reviewers beforehand, and a good starting point for finding reviewers are the authors of the related work you cite in your paper.