Conjugating verbs into the causative form gives the meaning of "making/ let someone do something".

I'm learning that it's used when the relationship between the person giving the request/demand and the person who has to do something is clear, i.e. teacher to student, parent to child, boss to subordinate.

Note to self - in the video below, it is also explained that the causative form can still be used if the action doer is a third party (not the speaker nor listener, or not clearly specified in the sentence).

Causative form is also applicable if it is to make someone feel an emotion (e.g. worry, sadness, anger), regardless of the relationship between the mentioned parties.

In general the syllable before the ます is conjugated to the あ-sound of that group, like み→ま、き→か、り→ら、び→ば、ち→た、し→さ。Special case is い→わ

If the syllable that comes before ます is the え-sound, like べ、け, we just add させます.

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を is commonly used and associated with "making/ forcing/ demanding" the person do something, while に is used when the action doer is willing to do it.

However, this rule also depends on the context and is not always strictly applicable XD