How an impact factor and ISI indexed research journal or conference can be beneficial to a researcher whose research is published in that journal. I mean if my articles are published in ISI indexed journal, then this impact factor is beneficial in which way to a researcher ? The researcher get recognition by the publication? or is it just requirement of research community ? . I am asking because some very goof research journals and conferences are not ISI Indexed or having impact factor. Is it compulsory to choose a journal or conference with impact factor?