Mar - shall
There are many reasons to learn how to divide Marshall into syllables. Separating a word like Marshall 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 Marshall into syllables allows speakers to better segment and emphasize each sound unit.
Knowing how to separate Marshall into syllables can be especially useful for those learning to read and write, because it helps them understand and pronounce Marshall more accurately. Furthermore, separating Marshall 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 Marshall, we find that when separating into syllables the resulting number of syllables is 2. With this in mind, it's much easier to learn how to pronounce Marshall, as we can focus on perfecting the syllabic pronunciation before trying to pronounce Marshall in full or within a sentence. Likewise, this breakdown of Marshall into syllables makes it easier for us to remember how to write it.