There are too many benefits of online learning if we talk about learning a new language or maths etc. You don`t waste your time to reach to the place where you need to take the lessons. No need to wear a mask that one is the most annoying part of learning journey when you are taking lessons face to face nowadays. As for disadvantages, the other day my friend told me her niece is taking online football lessons, i guess that kid has a lot to say about it :)