Why do you set a password on your smartphone? The reason for protecting your PDF document with a password is equally important: you want to protect data and information that could otherwise be accessible by unauthorized users. This prevents any misuse or mishandling of information and keeps any sensitive information secure. More importantly, you can protect your PDF file by adding a password to ensure that it is opened only by those authorized to do so. PDFs are easy-to-read, don't change format after opening, and are supported by any operating system.
In particular, PDFs are extremely useful when being shared across multiple platforms and devices.
It should come as no surprise that since the 1990s, the use of PDF documents has grown in great popularity and PDFs have become one of the world's most widely used formats distributed electronically every day.
How many emails have you received this week? And how many of them contained a PDF document as an attachment? It's safe to say that most of us deal with lots of PDFs on a regular basis.