It definitely varies by the field and subfield of the research. In my field, public health, the journal impact factor of 1-2 is considered average, and the impact factor of >4.0 is considered among the top. Having said that, the use of impact factor should be made with caution because it varies by targeted audience (e.g. practitioner vs. researcher), and country of origin for the journal. For instance, public health practitioners are likely to use research evidence to inform their work which should be highly desirable and perhaps the best reason for doing research. However the practitioners are less interested in publishing and therefore less likely to cite the paper they benefited from, so the impact will remain low. Academic journals and those open access are less useful as far as the use of their findings but the articles are more likely to be cited. Journals based in developed countries are more likely to be indexed and those in developing countries are less likely to be indexed and therefore may have little to no impact factor.

it not standards measurement between the impact factor and journal. research and journal and others (impact factor,....) unlimited science