Impact Factors (IF) are a benchmark of a journal's reputation and reflect how frequently journals are cited by other researchers. The IF helps to evaluate a journal’s relative importance. Today, IF is considered the number 1 ranking value for scientific journals and has become a substantial part of any journal development discussion. It was introduced in the late 1950s by Eugene Garfield and published since the 1960s by the Institute for Scientific Information (now Thomson Reuters).

Impact factor of journal = Number of times its articles have been cited/Number of total articles published in the journal. It is measure of popularity of the journal, not of individual articles in it.

You see Journals with ISSN no. serves the purpose like Cars, But those with IF are High in Status like SUV's. Every body can't afford a SUV and same here with IF Journals there always exists a selection bias. A worthless work having Big Shot Names attached with it will easily get selected, but if you are unknown or you can say New to the field, yours will not be, that easily.

Hi Saumendu Deb Roy, yours is a sentiment I do not share. I have heard similar arguments from people but I personally feel any good research speaks for itself, and doesnt need a "Big Shot Name" to be its advocate. Sometimes what we may assume as good research may just be an attempt by researchers to use words to hide their flawed experimental research; this will definitely not sell.

One problem is that all ISSN journals are not artbitrarily counted for impact factor determination, because either they are not available with Thomson's Reuters or they are ignored. IF has become a big handle of publilshers to promote their journals for profits. Like if high impact N****e is published in many countries,languages on numerous topics, most regional journals will dry like grass under 'shadow' of such big banyian trees. Young scientists may neither have resources nor material to publish in high impact journals; they may therefore, try to publish in ISSN journals and upload authour's manuscript on the web for real-time impact on prospective end-users.