Please log on the website of Thomson Reuters journal citation report list, place the name of the journal in searching and see the result. Do not listen to any claim of Impact Factor from any journal authority. Many vague Impact Factors are showed by many predatory journals. Be alert!
This sort of Impact Factors are worthless. It have to be given by Thompson Reuters/Clarivate Analytics and the journal should be listed at Science Citation Index (SCI)/ Web of Science list published by them. You can check it in their web page. Other journals claiming impact factors from strange, god know what type of inpact assesors like Global Impact Factor, please stay away from that. It's predatory.
Yes, Global impact factor helps. Publication in academic journals is a key criterion for appointment, tenure and promotion in universities. Many universities weigh publications according to the quality or impact of the journal. Traditionally, journal quality has been assessed through the ISI Journal Impact Factor (JIF).
However there are other impact factors– Hirsch’s h-index – and data source – Google Scholar – to assess journal impact
The process whereby the impact or "quality" of an article is assessed by counting the number of times other authors mention it in their work.
Citation analysis invovles counting the number of times an article is cited by other works to measure the impact of a publicaton or author. The caviat however, there is no single citation analysis tools that collects all publications and their cited references. For a thorough analysis of the impact of an author or a publication, one needs to look in multiple databases to find all possible cited references. A number of resources are available at UIC that identify cited works including: Web of Science, Scopus, Google Scholar, and other databases with limited citation data.