su - per - vi - sion
There are many reasons to learn how to divide supervision into syllables. Separating a word like supervision into syllables is mainly to make it easier to read and pronounce. The syllable is the smallest sound unit in a word, and the separation of the supervision into syllables allows speakers to better segment and emphasize each sound unit.
Knowing how to separate supervision into syllables can be especially useful for those learning to read and write, because it helps them understand and pronounce supervision more accurately. Furthermore, separating supervision into syllables can also be useful in teaching grammar and spelling, as it allows students to more easily understand and apply the rules of accentuation and syllable division.
In the case of the word supervision, we find that when separating into syllables the resulting number of syllables is 4. With this in mind, it's much easier to learn how to pronounce supervision, as we can focus on perfecting the syllabic pronunciation before trying to pronounce supervision in full or within a sentence. Likewise, this breakdown of supervision into syllables makes it easier for us to remember how to write it.