Use it when talking about what is true for many people or situations, but not all. People in general like to feel appreciated.
Pro Tip 2/3
Avoid Stereotyping
Be careful not to offend by making broad statements that may not apply to everyone. In general, students prefer interactive classes, but there are exceptions.
Pro Tip 3/3
Personal Perspective
You can use it to introduce your own viewpoint or summarize your thoughts. In general, I believe hard work pays off.