Here are some examples:
* "Do you know about the new restaurant downtown?" This asks if the person has any information about the restaurant, like its name, location, or type of food.
* "I know about the history of this city." This implies the speaker has some general knowledge about the city's past.
* "I don't know anything about quantum physics." This indicates the speaker has no familiarity with the subject.
The level of knowledge implied by "know about" can vary depending on the context. It's less specific than phrases like "know how" or "know why," which imply a deeper understanding.