Open access journal are the one’s which are available online to the reader without financial, legal, or technical barriers other than those inseparable from gaining access to the internet Some of the scholarly journal are subsidized, and some require payment. However, a number of challenges remain, such as high and rising subscription prices to scientific publications, an ever-growing volume of scientific data, and the need to select, curate and preserve research output. Open access benefit researcher, innovators, teacher, students, media professionals and the general public. It promotes global knowledge flow for the benefit of scientific discovery, innovation and socio-economic development.