The idiom "and so on" is used to indicate that there are more things to mention in a list, but the speaker doesn't want to list them all. It is also sometimes used to suggest that the listener should be able to infer the rest of the list based on what has already been said.
For example, if someone is talking about their favorite hobbies, they might say "I like to read, watch movies, go hiking, and so on." This means that there are other hobbies they enjoy, but they don't want to list them all.
Another example could be a teacher giving instructions to a student. The teacher might say, "First, you need to read the instructions, then gather your materials, and so on." This means that there are more steps to follow, but the teacher assumes the student knows what to do next.
In short, "and so on" is a useful idiom to use when you want to indicate that there are more items in a list, but you don't want to list them all.
• The art exhibit featured paintings, sculptures, photographs, installations, and so on, showcasing a diverse array of artistic styles and mediums.
• I like to eat pizza with pepperoni, mushrooms, onions, and so on.
• In my spare time, I like to read books, watch movies, go for walks, and so on.
• The politician discussed a range of issues during the debate, including education, healthcare, taxes, and so on.
• My sister enjoys listening to pop music, rock, country, and so on.
• The company offers various benefits to its employees such as health insurance, retirement plans, paid time off, and so on.