What is on or about?

"On" typically implies a position or location, such as "on the table" or "on the roof." It can also indicate connectivity or attachment, such as "on the internet" or "on a phone call."

"About" typically refers to a subject or topic, such as "talking about the weather" or "writing about history." It can also indicate a general idea or approximation, such as "about 10 inches of snow" or "feeling about the same as yesterday."