A file looks fine on your screen, but the text shifts on your teacher's screen, or the layout breaks on a family member's phone. When that happens, it is frustrating to think, "I made it correctly, so what went wrong?" That is where PDFs are often helpful.
PDFs Help Keep the Layout Consistent
PDFs are good at keeping text and images in the same layout. That makes them useful when you want people to see a file as it looks, such as when you submit an essay, send presentation slides, or show a notice to someone at home. They are also less dependent on which app was used to create the file.
Not Everything Should Be a PDF
But not everything should become a PDF. If you still need to edit something later, the original file matters too. PDFs are good for showing and sharing. Original files are better for creating and revising. Use a PDF when you submit something, and keep the original file when you may need to make changes later.
Look at one file you already have and ask yourself whether it is for editing or for showing. If you need to submit it, think about whether a PDF would make it easier to read.
At Digital Kodomo BASE, we value not only making things but also preparing them in a form that reaches other people clearly. Once you understand the role of each kind of file, sharing gets much easier.