Two types of attack when engaging in combat

In general, there are two types. The first type is to keeping on attacking an opponent with weapons, namely auto-attacking. This begins when double left-clicking or right-clicking on the opponent.
The second type is referred as the most effect on a target. This way is heavily involved in the use of all kinds of skills. Some of the skills can lead to devastating damage on the target in some cases, while others may have little effect or no damage. In order to make good use of these skills, a piece of advice is to place those skills on the quickbar and use the hot key.