Hey @venusofwillendork, thanks so much for adding these! They are all incredibly helpful.
I did not have any formal interviews when I was applying to my MA but I did reach out to profs whose work interested me. I don't think it mattered too much for MAs but it certainly makes a difference for PhDs! I visited some departments in November and met with my PoIs from each dept. These meetings were more casual interviews. Not stressful at all. They just asked broadly what my research interests are, what I thought about X and Y scholar in my field, what other places I am applying to etc.. I imagine the interviews that happen once they begin reviewing your application materials are a little more formal and motivated on their end.
If you get an interview, then your application clearly stands out and they mostly want to know more about your character, intellect, and fit. Are you intellectually compatible with your PoI? They want to know how your mind works and if the ideas in your SoP are truly yours. They want to know what your perspectives on the current debates in the field are/ how familiar you are with them. What is your motivation for a PhD? What is your work ethic? Will you follow through with this 5-7 year commitment, etc.! Show them how your mind works in real time My MA advisor reminded me to try and gauge what their commitment is to teaching as that will reflect on their style and level of commitment as a supervisor and that profs can only take on a certain number of students in their career—so if you get chosen, you will essentially be a part of their academic legacy. You want to convince them that they should pick you. Show them your intellectual capacity (while remaining humble, of course), show them your commitment and motivation, show them you are capable and competent, draw on your research and work/teaching experience, draw on your language skills, and most importantly, smile and take it easy!