When students are taught a new technique, they start with the base mechanics of the skill. At this early stage, they do not have a “feel” for the technique. They are in the early stages of mechanics.
With practice, the mechanics are usually gradually replaced with a more natural, thoughtless execution. The focus transitions from the base mechanics to adjusting for targets, distance, offensive and defensive applications etc…
This scenario is an example of how students learn motor skills. What is important here is that you, the instructor, learn how to effectively guide your students through the three stages of learning.
These stages will vary with each class and even each student depending on motivation, quality of instruction, and student initiative.