As you ask, the answer is "it depends". Most will reply that it is "very important", but in reality it is not. The impact factor is a measure related to the citations of a "small" group of journals that are in a secondary and selective database. What are you looking for as a researcher? If your interest is to generate quality knowledge that serves to generate more knowledge, you decide where to publish, choose the magazine that you believe best represents your discipline or your disciplinary community. Does not have an impact factor? Well, it does not matter. As long as you have a serious arbitration and it is a formal and serious academic journal, go ahead. The impact factor is an invention of capitalism to "regulate the invisible quality" of the production of knowledge. These companies are multi-million dollar and continue to earn more at our expense. As researchers we must demonstrate our maturity and responsibility with the work that we are so hard to do and not fall into the "easy" game of the impact factor, blindly believing that we are talking about "quality".
Impact factor refer to quality of the journal, but if you want your research to be available to everyone around the world then open access journal will be suitable no matter what the impact factor is.
One of the important factors in academic life is the generation of knowledge that appeals to other scholars. Consequently, number of citations provide the researchers with an index showing others' interests in one's works. As such, journal impact factor (JIF) is a measure reflecting the yearly average number of citations to a given article published in the journal. Therefore, the Journal Citation Reports calculated and listed by high impact factor journals have a great bearing on research conducted by targeted scholars.
This factor is very important indeed for the people making nowadays scientific reasearch. For instance, if you apply for a job in a research center around the world or to pass a thesis , the citation index of the journals where you have published is a very important factor. Unfortutelly most of the people don't read seriously the papers or the achievements for choosing reseachers in universities or other centers and they just take data as the number of authors, place where the author is, impact factor of the journals etc...Perhaps this is not the best way to find the most important but unfortunately there are not other many different forms to choose. Thus it is important the journal and the impact factor of it.
The impact factor of the journals is always important and the reason is very simple: it is one of the few parameters to measure the importance of the results taking into account the number of people who has found it important, i.e. number of cites.
Impact Factors are used to measure the importance of a journal by calculating the number of times selected articles are cited within the last few years. The higher the impact factor, the more highly ranked the journal. It is one tool you can use to compare journals in a subject category.
Is a measure of the importance of scientific journals within the field of research specialization, and reflects the coefficient of influence the extent of reference to new research research previously published in the magazine and cited, so that the magazine that has a high impact factor is an important magazine is referred to the research and cited more than those that have Low coefficient of effect