Pick PDF or DOCX wrong and you look like a noob to the person opening the attachment. Pick right and nobody notices the format at all. That is the whole point. There is a specific kind of panic that hits when you realize a 20 page proposal you spent all night on looks...
You paste a graphic into a slide deck and it drags a giant white box along with it. It completely covers up your background text. Or you try to email a batch of vacation photos to your family and your app flat out refuses to send the message because the attachments...
MP4 and MOV files look almost identical from the outside. Same video, same extension logic, but totally different behavior the moment you try to edit or share them. A MOV file that scrubs perfectly in Premiere will be unnecessarily massive when a client tries to open...
If you have been using the internet for a long time, you are probably used to seeing image formats like jpg or png. More recently though, you might have started seeing other types of image files that you aren't used to seeing. There is a new kid on the block and his...