A PDF is a kind of document that's easy to open on all sorts of platforms. It's good to use if you don't want someone else editing the document or when you don't want the look of the document to change, like when sharing your CV.
Drop a file anywhere on the page or click the button above
A GIF is a kind of picture that's often used on the internet. They can be animated, but the animated versions usually take up a lot of space. As pictures they're pretty small, but some detail is lost.