Wikipedia is a website that anyone can read, write and add information to. People like it because it provides a lot of useful information on almost any topic. However, not everything on Wikipedia is always 100% reliable. That doesn't mean it's not a good source of information, it just means you should be careful.
When reading a Wikipedia article, look for things like citations and references. Citations are pieces of information from other sources that back up what is written in the article. That way, you know that the information is coming from reliable sources and not just anyone's opinion. References are where you can often find the source for a citation.
You should also pay attention to the date the article was last updated - if it's from a few years ago, chances are things have changed since then. Finally, take a look at the talk page at the top of every article. This page is where people discuss the accuracy and reliability of the article.
So, Wikipedia can be a reliable source of information, but you should always use it with care. Double-check the sources and dates to make sure you're getting the most up to date, accurate information.