There are many pros to online classes. For instance, you can learn and read things at your own pace. Online classes give students more time to do assignments and a bit more leeway with their learning, which for some students is more helpful. Another pro is that students cannot be late to online classes, unless they have zoom meets, and there is no reason for students not to do their assignments in a timely manner as they typically have at least one week to do them. Online students can also range from on campus students to parents who decided to come back to school for a higher education. 
There are also many cons to online classes. For instance, students can cheat on assignments and not learn anything from the course. Students can also get easily confused on material and it is a struggle for them to get help as online students as professors may not check their emails or get back to the students on time leaving the students completely confused and alone. Online students tend to lack social interaction and connections with other students and professors as they tend to do their schoolwork in their dorms or areas on campus by themselves leaving them lonely and without a sense of connection or society. Another con is that students can become unmotivated if they only have online classes and rot in their dorm rooms and work on their schoolwork all day and night, they will slowly but surely give up on school and either drop out or go on academic probation. Online courses also do not limit distractions; students can do whatever they like such as watching shows and movies or scrolling through social media, doing anything but their schoolwork, which is concerning.