Both index mutual funds and ETFs are baskets of securities (like stocks or bonds) designed to track a specific market index.
Assuming you take the Udemy course, here is the practical "Sunday morning" routine they will teach you. Udemy - Index Mutual Funds and Etf - Low Cost ...
Based on the "Low Cost" mandate, here are the industry leaders: Both index mutual funds and ETFs are baskets
: One of the cheapest ETF options available with an expense ratio of 0.02% . Udemy - Index Mutual Funds and Etf - Low Cost ...