Compress PDF files to reduce the document's file size. PDFs can become very big which makes it difficult to send them over the internet. A compressed PDF is smaller, so you can easily send your applications or contracts via e-mail, or upload your documents on the web.
What is PDF compression?
Compressing a PDF reduces its file size. This is done by reducing the quality of images inside the PDF. Usually, this is done by changing those images' DPI.