Cosmology is a branch of astronomy that involves the inchoation and evolution of the macrocosm, from the Sizably voluminous Bang to today and on into the future. According to NASA, the definition of cosmology is the scientific study of the sizably voluminous scale properties of the macrocosm holistically." Cosmologists puzzle over exotic concepts like string theory, dark matter and dark energy and whether there is one macrocosm or many (sometimes called the multiverse). While other aspects astronomy deal with individual objects and phenomena or amassments of objects, cosmology spans the entire macrocosm from birth to death, with a wealth of mysteries at every stage. Humanity understanding of the macrocosm has evolved significantly over time. In the early history of astronomy, Earth was regarded as the center of all things, with planets and stars orbiting it. In the 16th century, Polish scientist Nicolaus Copernicus suggested that Earth and the other planets in the solar system in fact orbited the sun, engendering a profound shift in the construal of the cosmos. In the tardy 17th century, Isaac Newton calculated how the forces between planets; categorically the gravitational forces interacted. The second main avenue of testing fixates on the account of structure formation, which describes the evolution of minuscule perturbations away from the background FLRW geometry in terms of a minute number of parameters such as the tilt ns and the scalar to tensor ratio. Optical discernments from different epochs, such as temperature anisotropies in the CMB and the matter power spectrum predicated on galaxy surveys, can be utilized as independent constraints on these parameters as well as on the background parameters (indeed such optical discernments turn out to give the best constraints on the background model parameters). These two routes to testing virtually FLRW spacetime geometry are proximately linked because the background model provides the context for the evolution of perturbations under the dynamics described by general relativity. The top online publishing journals publish articles which are cited as references by many authors in their work. Citations are important for a journal to get impact factor. Impact factor is a measure reflecting the average number of citations to recent articles published in the journal. The impact of the journal is influenced by impact factor, the journals with high impact factor are considered more important than those with lower ones. Indexing provides easy access of the article online. The international journals are among the best open access journals in the world, set out to publish the most comprehensive, relevant and reliable information based on the current research and development on a variety of subjects. This information can be published in our peer reviewed journal with impact factors and are calculated using citations not only from research articles but also review articles (which tend to receive more citations), editorials, letters, meeting abstracts, short communications, and case reports. The inclusion of these publications provides the opportunity for editors and publishers to manipulate the ratio used to calculate the impact factor and try to increase their number rapidly. Impact factor plays a major role for the particular journal.