Wikipedia is a big website with lots of articles that people can read about all sorts of things like animals, countries, and even toys. There are so many articles that some people might be curious about how many times others have looked at one of these articles.
This is where "pageviews" come in. A "pageview" is simply when someone looks at one of the articles on Wikipedia. It's like when you look at a picture book - every time you turn to a new page, you're giving that page a "pageview."
Wikipedia counts how many pageviews their articles get so that they can see which ones are most popular and interesting to people. They also use this information to help improve their website by making sure that the articles people are looking at the most are still up to date and have accurate information.
So, basically, when people look at an article on Wikipedia, they are adding to its "pageviews." And by counting these pageviews, Wikipedia can learn more about what people want to read about and make their website even better.