Nowadays Multiwavelength (MWL) astrophysics (and recently also Multi-messenger) is making immense progress in the understanding of the emission mechanism of several celestial objects. Collecting data from different telescopes observing the same target simultaneously is of paramount importance in the study of galactic and extragalactic sources. The advances in technology are enabling observations of nonthermal radiation produced in multiple objects, such as Active Galactic Nuclei (AGNs), binary systems, supernova remnants, clusters of galaxies, Gamma-ray bursts and also our Galactic Center. Many objects emit photons through the entire electromagnetic spectrum and that is why MWL campaigns are often organized in order to collect as much as possible simultaneous data. In those efforts numerous researchers and observatories collaborate together. In this work, I use two broadband Spectral Energy Distributions (SEDs) of an AGN named S5 0716+714, which is a BL Lac type blazar, during a particular bright flaring activity in 2015 that emitted photons from radio to the very-high-energy (VHE) gamma-rays. In that occasion, a theoretical modelling was applied, which was not entirely successful. Since modelling a broadband dataset is of high importance in order to shed light on the processes behind the broadband emission, I worked with a program named JeTSet, written in C and python language, which is devoted to modelling and interpretation of SEDs from AGNs and widely used in this field of research. I applied a simple pure leptonic model, the Synchrotron Self Compton (SCC) model to the dataset. My results show that the dataset can not be reproduced by such a model, which was expected. However, it allowed me to learn how to use the code and interpret complex datasets in Multiwavelength astrophysics, and to review the activity of the source in that particular state of activity.