In my first installment of How to Be a Better Gamer I will discuss APM
Actions per minute is the number of actions (such as selecting units or issuing an order) completed within a minute of gameplay in a real time strategy game. High APM is often associated with skill, as it can indicate that a player both knows what to do in the game and has the manual dexterity to carry it out. Software has been developed to analyze players' APM in these games. Beginners often have low APM count, typically below 100. Professional e-athletes in South Korea have APM in the range of excess of 300 and occasionally exceed 400.
A player's APM value is determined by the number of actions performed in a given time. Some actions (such as repeated selection) are easier to carry out than others, and players may repeatedly perform (or "spam") these actions. This "spamming" may be used as a way to warm up and maintain speed for later phases of the game, or it may be used simply to increase a player's recorded APM in order to improve the perception of their gameplay skills. Because of this, more sophisticated measures of APM may attempt to filter out redundant actions by means such as ignoring re-selection of a group of units which was already selected and ignoring the very beginning of the game (when the typical relative lack of action facilitates spamming), in order to only measure a player's "efficient/effective" APM value.