Strategy/RTS or Real-Time Strategy games are all about building armies, managing resources, expanding the main base, and fortifying it to defend against AI or other player troops. The key factor that differentiates the RTS genre from other strategy genres, as the name suggests, is that all actions take part in real-time.
An in-game clock introduces new challenges to strategy games, the player is forced to make momentary and swift decisions based on limited information. Given enough time, anyone can make a good decision. Strategy genre enforces critical thinking to not only consider current actions but also plan upfront. The implementation of the inner clock presents players with an interesting twist to strategy games, splitting them into two sections, turn-based and real-time.