Discovering that pages need basic copyediting may surprise new visitors to Wikipedia. This is because the encyclopedia is a dynamic work in progress, published while it is being developed and updated in real time by people all over the world. Millions of the articles need simple improvements. You don't have to be an expert to edit Wikipedia. Just click the edit tab at the top of the page and start typing away!
Copyediting involves the "five Cs": making the article clear, correct, concise, comprehensible, and consistent. So, if you see something you can fix, click on the "edit" tab at the top of the page, and start typing in the edit window to fix it. Be bold. And, if there are any facts you know about the subject that are missing, then please, add them in!
For general help with editing, see Wikipedia:How to edit a page.