Perhaps the best way is to look at journal impact factors. This is a measure of the average number of citations taken from articles published in a journal. The impact factor provides a measure reflecting the yearly average number of citations to recent articles published in that journal. It can also be used to see the relative impact of individual articles (In fact,I suspect this system is used by researchgate in some modification) for our measures of citations....but I may be wrong. The impact factor of journals has long been used by researchers in determining where to send a manuscript for review and publication. Look at the Institute for Scientific Information and the Journal Citation Reports. One caveat is that most citation systems -- including the one mentioned above tend not to include journals until they have 5-8 years of a publication record...so hose journals may not be listed but may still be excellent journals.There are certainly some criticisms of impact factors.....from a number of sources but I find them beneficial. I believe several other systems to determine valid journals also exist...especially the Thomson Reuters Index list of journals.....this also provides data on legitimate journals.
There are 1000s of journals these days, World of Science (WOS) calculated some 7,600 recently with new Open Access journals launching all the time. Be wary of fraudulent journals and check Beall’s List of Predatory Open Access Publishers http://scholarlyoa.com/tag/predatory-publishers/
What is the perceived quality of the journal in your field? The reputation of the publishers. How does the impact factor (Thomson ISI Citation Reports, WOS) compare with competing journals? response lag, time to print/online, issues per volume/year, rejection rates, page charges, open-access peer perception, who/what is publishing there? seek views from mentors & tap experienced authors in your field, who’s on the Editorial Board/the Editors, check the annual reviewer list.
Dear, Bahir Dar University as rule follow Beall's list of Predatory list of journals and Publishers for incentive and promote academic staff. However, the challenge is still there are 100 of journals and publishers that seems Beall’s List of Predatory journal and publishers. i.e still there others the deserve to be included in Beall’s List of Predatory.