The graph is one of the most interesting data structures that is used to solve various real-life problems. Whether we are talking about showing directions on maps, finding the shortest route, planning for complex network flow, finding a connection between profiles in social media, or recommendations, we are dealing with graph data structures and their associated algorithms. Graphs give us so many ways to solve problems that they have been used frequently to solve complex problems. As a result, it is very important for us to understand graphs and how we can use them in our solutions.