Are Udemy certificates worth mentioning in a CV?
TL:DR: Yes, if relevant to the MS. Anything you do to improve yourself that relates to the degree you are applying for YES! It shows you continue to hone your craft, you want to be better and you will do it on your own time and your own dime. Dont have 50 courses, pick the top ones that relates to the degree and use those, you can keep the full list on LinkedIn. When I have hired knowing someone is hungry to learn more about the field and will go find the knowledge is a huge plus. I would imagine a review board at a college would look for something similar.