The one who enters whether in the market or in some resources first. First mover advantage is that it can earn loyalty from the customers, can engage more audience as compared to the second movers and thus they can be successful by entering their name on top of the list. Another advantage is that they can be the controller of resources since there is no or low competition of that resource.
Diagrams
Originated from/Coined by
Further Reading/ References
https://en.wikipedia.org/wiki/First-mover_advantage