Many real-world problems can be formulated and modeled in the language of graph theory. However, real-world networks are often not static. They change over time. These structures are called dynamic or temporal graphs. Here’s an example of temporal star with four leaves; each one of its edges is active twice except for 
which is active three times.
This is a companion discussion topic for the original entry at https://bmbumpus.com/2022/11/11/categories-of-temporal-graphs-%c2%a71/